Stockholders' Equity (Deficit) (Details 3) shares in Thousands	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Shares
Non-vested, Beginning balance | shares	718
Granted | shares	40
Vested | shares	(170)
Non-vested, Ending balance | shares	588
Weighted Average Grant-Date Fair Value per share
Non-vested, Beginning balance | $ / shares	$ 0.54
Granted | $ / shares	0.50
Vested | $ / shares	0.63
Non-vested, Ending balance | $ / shares	$ 0.64