Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Narrative (Details)

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Fair Value Measurements - Narrative (Details) - USD ($)
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2017
Dec. 31, 2016
Sep. 28, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Change in fair value of convertible note embedded derivative liability $ (1,308,000) $ 0      
Stock price ($ per share) $ 1.03   $ 0.99    
Warrant adjustment $ 464,000 $ 0      
Convertible notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Original discount         $ 4,916,000
Debt face amount       $ 16,000,000 $ 16,000,000
Interest rate         8.75%