Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Changes in Fair Value of Financial Instruments (Detail)

v3.7.0.1
Fair Value Measurements - Changes in Fair Value of Financial Instruments (Detail)
$ in Thousands
6 Months Ended
Jun. 30, 2017
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance $ 20,941
Conversion into common shares (1,064)
Issuance of warrants 0
Change in fair value of investments (511)
Change in fair value of convertible notes 285
Change in fair value of derivative liabilities (5,794)
Balance 13,857
Helocyte Convertible Note At Fair Value [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 4,487
Conversion into common shares 0
Issuance of warrants 0
Change in fair value of investments 0
Change in fair value of convertible notes 186
Change in fair value of derivative liabilities 0
Balance 4,673
Avenue Convertible Note, at fair value [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 200
Conversion into common shares (299)
Issuance of warrants 0
Change in fair value of investments 0
Change in fair value of convertible notes 99
Change in fair value of derivative liabilities 0
Balance 0
Warrants Issued Issuable [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 14,661
Conversion into common shares (750)
Issuance of warrants (8,190)
Change in fair value of investments 0
Change in fair value of convertible notes 0
Change in fair value of derivative liabilities (5,721)
Balance 0
Warrant liabilities [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 179
Conversion into common shares (15)
Issuance of warrants 8,190
Change in fair value of investments 0
Change in fair value of convertible notes 0
Change in fair value of derivative liabilities (73)
Balance 8,281
Investment In Laser Device [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 250
Conversion into common shares 0
Issuance of warrants 0
Change in fair value of investments 0
Change in fair value of convertible notes 0
Change in fair value of derivative liabilities 0
Balance 250
Investment In Origo [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 1,164
Conversion into common shares 0
Issuance of warrants 0
Change in fair value of investments (511)
Change in fair value of convertible notes 0
Change in fair value of derivative liabilities 0
Balance $ 653