Stockholders' Equity - Non-vested RSUs (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Dec. 05, 2019	Dec. 06, 2018	Mar. 31, 2020	Mar. 31, 2019
Weighted Average Grant Date Fair Value
Stock-based compensation			$ 891	$ 754
Restricted Stock Units
Number of Shares
Non-vested at beginning of period (in shares)			2,945,585
Granted (in shares)	2,170,585	1,255,000	250,000
Forfeited/Cancelled			(118,400)
Non-vested at end of period (in shares)			3,077,185
Weighted Average Grant Date Fair Value
Non-vested at beginning of period (in dollars per share)			$ 0.73
Granted (in dollars per share)			0.79
Forfeited (in dollars per share)			0.70
Non-vested at end of period (in dollars per share)			$ 0.73
Stock-based compensation			$ 300
Unrecognized compensation expense			$ 1,900
Weighted average remaining period for recognition of unrecognized compensation expense			1 year 11 months 23 days