Quarterly report pursuant to Section 13 or 15(d)

Debt and Interest - Long-term debt (Detail)

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Debt and Interest - Long-term debt (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Debt [Line Items]    
Total notes payable, long-term $ 89,492 $ 84,406
Less: Discount of notes payable 6,608 4,903
Total notes payable $ 82,884 79,503
Interest Rate 2.50%  
IDB Note [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 14,929 14,929
Interest Rate 2.25%  
Maturity Date Aug - 2020  
2017 Subordinated Note Financing One [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 3,254 3,254
Interest Rate 8.00%  
Maturity Date March - 2020  
2017 Subordinated Note Financing Two [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 13,893 13,893
Interest Rate 8.00%  
Maturity Date May - 2020  
2017 Subordinated Note Financing Three [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 1,820 1,820
Interest Rate 8.00%  
Maturity Date June - 2020  
2017 Subordinated Note Financing Four [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 3,018 3,018
Interest Rate 8.00%  
Maturity Date August - 2020  
2017 Subordinated Note Financing Five [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 6,371 6,371
Interest Rate 8.00%  
Maturity Date September - 2020  
Opus Credit Facility [Member]    
Debt [Line Items]    
Total notes payable, long-term [1] $ 9,500 9,500
Interest Rate [1] 12.00%  
Maturity Date [1] September - 2019  
Caelum Convertible Note One [Member]    
Debt [Line Items]    
Total notes payable, long-term [1] $ 0 1,000
Interest Rate [1] 8.00%  
Maturity Date [1] January - 2019  
Caelum Convertible Note Two [Member]    
Debt [Line Items]    
Total notes payable, long-term [1] $ 0 6,800
Interest Rate [1] 8.00%  
Maturity Date [1] February - 2019  
Caelum Convertible Note Three [Member]    
Debt [Line Items]    
Total notes payable, long-term [1] $ 0 2,114
Interest Rate [1] 8.00%  
Maturity Date [1] March - 2019  
Venture Notes One [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 6,517 6,517
Interest Rate 8.00%  
Maturity Date February - 2021  
Venture Notes Two [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 15,190 15,190
Interest Rate 8.00%  
Maturity Date March - 2021  
Mustang 2019 Venture Debt [Member]    
Debt [Line Items]    
Total notes payable, long-term [2] $ 15,000 $ 0
Interest Rate [2] 9.00%  
Maturity Date [2] October - 2022  
[1] Classified as short-term on the Company’s Consolidated Balance Sheet as of December 31, 2018.
[2] Interest rate is 9.0% plus one-month LIBOR Rate in excess of 2.5%