Quarterly report pursuant to Section 13 or 15(d)

Debt and Interest - Schedule of Interest Expenses for Debt Arrangements (Detail)

v3.8.0.1
Debt and Interest - Schedule of Interest Expenses for Debt Arrangements (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Debt [Line Items]    
Total Interest Expense and Financing Fee $ 2,083 $ 698
LOC Fees [Member]    
Debt [Line Items]    
Interest 7 8
Interest and Debt Expense 7 8
IDB Note [Member]    
Debt [Line Items]    
Interest 84 82
Interest and Debt Expense 84 82
NSC Debt [Member]    
Debt [Line Items]    
Interest 0 71
Amortization of fees 0 38
Interest and Debt Expense 0 109
2017 Subordinated Note Financing [Member]    
Debt [Line Items]    
Interest 1,048 0
Amortization of fees 21 0
Interest and Debt Expense 1,069 0
Opus Credit Facility [Member]    
Debt [Line Items]    
Interest 281 232
Amortization of fees 319 208
Interest and Debt Expense 600 440
2018 Venture Notes [Member]    
Debt [Line Items]    
Interest 56 0
Amortization of fees 1 0
Interest and Debt Expense 57 0
Helocyte Convertible Note [Member]    
Debt [Line Items]    
Interest 68 54
Financing fee 0 1
Interest and Debt Expense 68 55
Avenue Convertible Note [Member]    
Debt [Line Items]    
Financing fee 0 3
Interest and Debt Expense 0 3
Caelum Convertible Notes [Member]    
Debt [Line Items]    
Interest 196 0
Interest and Debt Expense 196 0
Other [Member]    
Debt [Line Items]    
Interest 2 1
Interest and Debt Expense $ 2 $ 1