Subsequent Event (Details) - Subsequent Event - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended
	Mar. 22, 2017	Mar. 29, 2017
Subsequent Event [Line Items]
Exercise price of warrants (dollars per share)	$ 2.00
Warrant expiration period	5 years
Aggregate gross proceeds for private placement	$ 18,900	$ 18,900
Purchase Agreement
Subsequent Event [Line Items]
Number of days during which new agreement or issuances are prohibited	90 days
Maximum | Certificate of Designation
Subsequent Event [Line Items]
Convertible preferred stock, percentage of shares issuable upon conversion	19.99%
Common Stock
Subsequent Event [Line Items]
Issuance of common stock upon securities purchase agreement	1,809,628
Common stock purchase price share	$ 2.00
Number of warrants issued (in shares)	9,432,000
Common Stock | Certain Directors and Executive Officers | Maximum
Subsequent Event [Line Items]
Number of warrants issued (in shares)	1,175,000
Series A Convertible Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares issued	15,245
Shares issued price per share	$ 1,000
Preferred stock initial conversion price per share	$ 2.00
Preferred stock, shares outstanding	0
Series A Convertible Preferred Stock | Certificate of Designation
Subsequent Event [Line Items]
Preferred stock convertible to common stock	500
Preferred stock, shares authorized	15,245
Preferred stock, stated value per share	$ 1,000
Series A Convertible Preferred Stock | Certain Directors and Executive Officers
Subsequent Event [Line Items]
Preferred stock convertible to common stock	1,175,000
Aggregate amount of convertible preferred shares purchased	$ 2,350
Series A Convertible Preferred Stock | Common Stock
Subsequent Event [Line Items]
Preferred stock convertible to common stock	7,622,372