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
3 Months Ended
Mar. 31, 2017
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance $ 20,941
Change in fair value of investments (668)
Change in fair value of convertible notes 97
Change in fair value of derivative liabilities (4,342)
Balance 16,028
Contingently Issuable Warrant [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 14,661
Change in fair value of investments 0
Change in fair value of convertible notes 0
Change in fair value of derivative liabilities (4,267)
Balance 10,394
Helocyte Convertible Note At Fair Value [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 4,487
Change in fair value of investments 0
Change in fair value of convertible notes 93
Change in fair value of derivative liabilities 0
Balance 4,580
Avenue Convertible Note, at fair value [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 200
Change in fair value of investments 0
Change in fair value of convertible notes 4
Change in fair value of derivative liabilities 0
Balance 204
Warrant liabilities [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 179
Change in fair value of investments 0
Change in fair value of convertible notes 0
Change in fair value of derivative liabilities (75)
Balance 104
Investment In Laser Device [Member]  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance 250
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
Change in fair value of investments (668)
Change in fair value of convertible notes 0
Change in fair value of derivative liabilities 0
Balance $ 496