Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 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	$ 2,853,000	$ 0	$ 2,423,000	$ 0
Stock price ($ per share)	$ 0.68		$ 0.68		$ 1.05	$ 0.99
Warrant adjustment	$ (937,000)		$ (797,000)	$ 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			$ 16,000,000
Interest rate						8.75%