Stockholders' Equity - Non-vested RSUs (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Dec. 05, 2019	Dec. 06, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Weighted Average Grant Date Fair Value
Stock-based compensation			$ 3,232	$ 4,367	$ 6,387
Restricted Stock Units
Number of Shares
Non-vested at beginning of period (in shares)			1,255,000
Granted (in shares)	2,170,585	1,255,000	2,500,585	1,255,000
Vested (in shares)			(572,500)
Forfeited/Cancelled			(237,500)
Non-vested at end of period (in shares)			2,945,585	1,255,000
Weighted Average Grant Date Fair Value
Non-vested at beginning of period (in dollars per share)			$ 0.65
Granted (in dollars per share)			0.74	$ 0.65
Vested (in dollars per share)			0.65
Forfeited (in dollars per share)			0.65
Non-vested at end of period (in dollars per share)			$ 0.73	$ 0.65
Unrecognized compensation expense			$ 2,000
Weighted average remaining period for recognition of unrecognized compensation expense			1 year 11 months 16 days
Maximum | Restricted Stock Units
Weighted Average Grant Date Fair Value
Stock-based compensation			$ 500	$ 100