Debt and Interest- Additional Information (Detail) - USD ($) |
1 Months Ended | 3 Months Ended |
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Mar. 29, 2019 |
Mar. 31, 2019 |
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| Debt [Line Items] | ||
| Debt Instrument, Interest Rate, Stated Percentage | 2.50% | |
| Debt Instrument, Description of Variable Rate Basis | 9.0% plus one-month LIBOR Rate | |
| Debt Instrument, Redemption, Description | At its option, upon ten business days’ prior written notice to Horizon, Mustang may prepay all or any portion greater than or equal to $500,000 of each of the outstanding advances by paying the entire principal balance (or portion thereof) and all accrued and unpaid interest, subject to a prepayment charge of 4.0% of the then outstanding principal balance of each advance if such advance is prepaid on or before the Loan Amortization Date (as defined in the Loan Agreement), 3% if such advance is prepaid after the Loan Amortization Date applicable to such Loan, but on or prior to twelve months following the Loan Amortization Date, and 2% thereafter. In addition, a final payment equal to $0.3 million for each advance (i.e., $0.8 million in aggregate with respect to the initial $15.0 million) is due on the maturity date or other date of payment in full. Amounts outstanding during an event of default shall be payable on demand and shall accrue interest at an additional rate of 5.0% per annum of the past due amount outstanding. | |
| Debt Instrument, Debt Default, Description of Violation or Event of Default | The events of default under the Loan Agreement include, among other things, without limitation, and subject to customary grace periods, (1) Mustang’s failure to make any payments of principal or interest under the Loan Agreement, promissory notes or other loan documents, (2) Mustang’s breach or default in the performance of any covenant under the Loan Agreement, (3) the occurrence of a material adverse change, (4) Mustang making a false or misleading representation or warranty in any material respect, (5) Mustang’s insolvency or bankruptcy, (6) certain attachments or judgments on the Mustang’s assets, (7) the occurrence of any material default under certain agreements or obligations of Mustang involving indebtedness in excess of $0.3 million or (8) failing to maintain minimum monthly cash balances which range from approximately $8.0 to $13.0 million over the term of the loan. If an event of default occurs, Horizon is entitled to take enforcement action, including acceleration of amounts due under the Loan Agreement. | |
| Percentage of Warrants Included in Debt | 5.00% | |
| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | 288,184 | |
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 3.47 | |
| Warrants Not Settleable in Cash, Fair Value Disclosure | $ 900,000 | |
| Horizon Technology Finance Corporation [Member] | ||
| Debt [Line Items] | ||
| Legal Fees | 1,200,000 | |
| Line of Credit Facility, Commitment Fee Amount | 200,000 | |
| Reimbursement of Legal Fees | 30,000 | |
| Mustang Two Thousand Nineteen Venture Debt [Member] | ||
| Debt [Line Items] | ||
| Line of Credit Facility, Current Borrowing Capacity | 20,000,000 | |
| Line of Credit Facility, Maximum Borrowing Capacity | 15,000,000 | |
| Line of Credit Facility, Remaining Borrowing Capacity | $ 5,000,000 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Percentage of Warrants Included in Total Amount Funded. No definition available.
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- Definition Amount of Reimbursement of Legal Fees. No definition available.
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- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. No definition available.
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. No definition available.
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Description of debt redemption features under terms of the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Discussion of the facts and amounts pertaining to each failure to comply with an affirmative or negative covenant of a long-term debt instrument, including violating payment terms or an inability to meet certain minimum financial requirements or achieve or maintain certain financial ratios. The discussion would generally be expected to also include whether or not the failure can and will be overcome and a description of the terms of any waivers, including the amount of the waiver and the period of time covered by the waiver, and if reclassification of long-term debt to current has been made in the current balance sheet. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of the fee for available but unused credit capacity under the credit facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value portion of warrants not settleable in cash classified as equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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