Stockholders' Equity - Issuance of Common Stock and Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	9 Months Ended
	Mar. 21, 2016	Mar. 31, 2016	Oct. 02, 2016	Sep. 27, 2015	Jan. 03, 2016
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001		$ 0.001
Underwritten public offering price (in dollars per share)	$ 1.00	$ 1.00
Net proceeds	$ 8,800	$ 8,800	$ 10,337	$ 394
Offering expenses		$ 1,200	$ 1,197	$ 0
Warrants outstanding (in shares)			2,300,000
June 2012 financing
Class of Stock [Line Items]
Warrants outstanding (in shares)			2,300,000
Strike price of warrants (in dollars per share)			$ 2.98
Common stock
Class of Stock [Line Items]
Aggregate shares of common stock issued	10,000,000.0	10,000,000