Non-Cash Share-Based Employee Compensation (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) $ / shares shares
Non-Cash Share-Based Employee Compensation
Outstanding Stock Options, Beginning Balance | shares	676,500
Vested Stock Options, Beginning Balance | shares	361,600
Nonvested Stock Options, Beginning Balance | shares	314,900
Exercised Stock Option | shares	0
Issued Stock Options | shares	237,500
Forfeited Stock Option | shares	0
Expired Stock Options | shares	5,000
Outstanding Stock Options, Ending Balance | shares	909,000
Vested Stock Options, Ending Balance | shares	461,933
Nonvested Stock Options, Ending Balance | shares	447,067
Outstanding Wgt. Avg. Exercise Price, Beginning Balance	$ 3.68
Vested Wgt. Avg. Exercise Price, Beginning Balance	3.80
Nonvested Wgt. Avg. Exercise Price, Beginning Balance	3.53
Issued Wgt. Avg. Exercise Price	2.38
Exercised Wgt. Avg. Exercise Price	0
Forfeited Wgt. Avg. Exercise Price	0
Expired Wgt. Avg. Exercise Price	4.95
Outstanding Wgt. Avg. Exercise Price, Ending Balance	3.33
Vested Wgt. Avg. Exercise Price, Ending Balance	3.67
Nonvested Wgt. Avg. Exercise Price, Ending Balance	$ 2.98
Outstanding Contractual Life, Beginning	7 years 3 months 29 days
Vested Contractual Life, Begining	6 years 7 months 28 days
Nonvested Contractual Life, Begining	8 years 1 month 6 days
Outstanding Contractual Life, Ending	7 years 10 months 13 days
Vested Contractual Life, Ending	6 years 10 months 13 days
Nonvested Contractual Life, Endinging	8 years 10 months 21 days
Outstanding Grant Date Fair Value	$ 1.41
Vested Grant Date Fair Value	1.44
Nonvested Grant Date Fair Value	1.39
Issued Grant Date Fair Value	0.78
Exercised Grant Date Fair Value	0
Forfeited Grant Date Fair Value	0
Expired Grant Date Fair Value	1.05
Outstanding Grant Date Fair Value	1.25
Vested Grant Date Fair Value	1.37
Nonvested Grant Date Fair Value	$ 1.13
Outstanding Aggregate Intrinsic Value | $	$ 4,500
Vested Aggregate Intrinsic Value | $	4,500
Nonvested Aggregate Intrinsic Value | $	0
Issued Aggregate Intrinsic Value | $	0
Forfeited Aggregate Intrinsic Value | $	0
Exercised Aggregate Intrinsic Value | $	0
Outstanding Aggregate Intrinsic Value | $	49,050
Vested Aggregate Intrinsic Value | $	20,833
Nonvested Aggregate Intrinsic Value | $	$ 28,217