Stock Incentive Plans - Schedule of stock options and stock awards (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number of Shares
Outstanding at beginning of period (in shares)	726,500
Outstanding at end of period (in shares)	846,731	726,500
Aggregate Intrinsic Value
Share price (in dollars per share)	$ 1.96	$ 5.50
The 2013 Plan and The 2014 Plan
Number of Shares
Outstanding at beginning of period (in shares)	726,500
Granted (in shares)	262,475
Exercised (in shares)	0
Forfeited or expired (in shares)	142,244
Outstanding at end of period (in shares)	846,731	726,500
Vested and exercisable (in shares)	384,858
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 4.53
Granted (in dollars per share)	3.83
Exercised (in dollars per share)	0
Forfeited or expired (in dollars per share)	9.73
Outstanding at end of period (in dollars per share)	4.00	$ 4.53
Vested and exercisable (in dollars per share)	$ 4.85
Weighted Average Remaining Contractual Term (in years)
Outstanding weighted average remaining contractual term	7 years 7 months 6 days	7 years 2 months 12 days
Granted	5 years
Exercised	0 years
Forfeited or expired	0 years
Vested and exercisable	6 years 7 months 6 days
Aggregate Intrinsic Value
Outstanding at beginning of period	$ 1,484
Granted	0
Exercised	0
Forfeited or expired	0
Outstanding at end of period	0	$ 1,484
Vested and exercisable	$ 0