Subsequent Events - Cash and Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 28, 2016	Jan. 25, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Subsequent Event [Line Items]
Cash			$ 2,035	$ 5,201	$ 3,970	$ 8,319
Common stock, value			3,121	2,835
Additional paid-in capital			156,195	150,747
Accumulated deficit			(159,028)	(148,154)
Less: Treasury stock, at cost; 9,395 shares as of December 31, 2015 and 2014			(71)	(71)
Total stockholders' equity			$ 217	$ 5,357	$ 13,300	$ 23,861
Common stock, par value (in usd per share)			$ 0.04	$ 0.04
Common stock, shares authorized (shares)			240,000,000	240,000,000
Common stock, shares issued (shares)			78,025,998	70,875,998
Common stock, shares outstanding (shares)			78,016,603	70,866,603
Treasury stock (shares)			9,395	9,395
Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, par value (in usd per share)	$ 0.04
Subsequent Event [Member] | Additional Equity Raised [Member]
Subsequent Event [Line Items]
Cash		$ 4,712
Common stock, value		1,961
Additional paid-in capital		2,751
Accumulated deficit		0
Less: Treasury stock, at cost; 9,395 shares as of December 31, 2015 and 2014		0
Total stockholders' equity		4,712
Subsequent Event [Member] | Pro Forma including Additional Equity [Member]
Subsequent Event [Line Items]
Cash		6,747
Common stock, value		5,082
Additional paid-in capital		158,946
Accumulated deficit		(159,028)
Less: Treasury stock, at cost; 9,395 shares as of December 31, 2015 and 2014		(71)
Total stockholders' equity		$ 4,929
Common stock, par value (in usd per share)		$ 0.04
Common stock, shares authorized (shares)		240,000,000
Common stock, shares issued (shares)		117,052,837
Common stock, shares outstanding (shares)		117,043,442
Treasury stock (shares)		9,395