Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Debt and Interest - Schedule of Interest Expenses for Debt Arrangements (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Debt [Line Items]        
Total Interest Expense and Financing Fee $ 1,380 $ 529 $ 2,078 $ 1,149
LOC Fees [Member]        
Debt [Line Items]        
Interest 7 3 15 7
Interest and Debt Expense 7 3 15 7
IDB Note [Member]        
Debt [Line Items]        
Interest 87 79 169 159
Amortization of fees 0 0 0 1
Interest and Debt Expense 87 79 169 160
NSC Debt [Member]        
Debt [Line Items]        
Interest 84 144 155 311
Amortization of fees 40 54 73 422
Interest and Debt Expense 124 198 228 733
NHLD Debt [Member]        
Debt [Line Items]        
Interest 406 0 406 0
Amortization of fees 175 0 175 0
Interest and Debt Expense 581 0 581 0
Opus Credit Facility [Member]        
Debt [Line Items]        
Interest 276 0 508 0
Amortization of fees 241 0 454 0
Interest and Debt Expense 517 0 962 0
Avenue Convertible Note [Member]        
Debt [Line Items]        
Interest 5 0 5 0
Financing fee 0 0 3 0
Interest and Debt Expense 5 0 8 0
Helocyte Convertible Note [Member]        
Debt [Line Items]        
Interest 57 0 111 0
Financing fee 0 249 1 249
Interest and Debt Expense 57 249 112 249
D&O Insurance [Member]        
Debt [Line Items]        
Interest 2 0 3 0
Interest and Debt Expense $ 2 $ 0 $ 3 $ 0