Stockholders' Equity - Schedule of Warrants Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Number of Shares
Outstanding at beginning of period (in shares)	27,000
Forfeited (in shares)	13,500
Outstanding at end of period (in shares)	63,100	27,000
Weighted- average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 14.51
Forfeited (in dollars per share)	14.51
Outstanding at end of period (in dollars per share)	$ 12.54	$ 14.51
Warrants to purchase common stock
Number of Shares
Outstanding at beginning of period (in shares)	342,610
Exercised (in shares)	(59,510)
Forfeited (in shares)	(4,300)
Outstanding at end of period (in shares)	278,800	342,610
Exercisable (in shares)	278,800
Weighted- average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 9.77
Exercised (in dollars per share)	10.00
Forfeited (in dollars per share)	10.00
Outstanding at end of period (in dollars per share)	9.72	$ 9.77
Exercisable (in dollars per share)	$ 9.72
Weighted- average Remaining Contractual Term (years)
Outstanding	4 years 3 days	3 years 8 months 15 days
Exercisable	4 years 3 days
Aggregate Intrinsic Value
Outstanding	$ 40	$ 1,585
Exercisable	$ 40