10. Share-Based Employee Compensation (Details 1) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract]
Outstanding stock options | shares	460,500
Vested stock options | shares	156,900
Nonvested stock options | shares	303,600
Issued stock options | shares	150,000
Exercised stock options | shares	1,000
Forfeited stock options | shares	40,000
Expired stock options | shares
Outstanding stock options | shares	569,500
Vested stock options | shares	214,800
Nonvested stock options | shares	354,700
Outstanding wgt. avg. exercise price	$ 4.22
Vested wgt. avg. exercise price	4.03
Nonvested wgt. avg. exercise price	4.32
Issued wgt. avg. exercise price	4.01
Exercised wgt. avg. exercise price	1.89
Forfeited wgt. avg. exercise price	4.35
Expired wgt. avg. exercise price
Outstanding wgt. avg. exercise price	4.16
Vested wgt. avg. exercise price	4.12
Nonvested wgt. avg. exercise price	$ 4.18
Outstanding contractual life	6 years 9 months 25 days
Vested contractual life	4 years 2 months 12 days
Nonvested contractual life	4 years 2 months 5 days
Outstanding grant date fair value	$ 1.76
Vested grant date fair value	2.05
Nonvested grant date fair value	1.61
Issued grant date fair value	1.64
Exercised grant date fair value	0.71
Forfeited grant date fair value	1.49
Expired grant date fair value
Outstanding grant date fair value	1.75
Vested grant date fair value	1.95
Nonvested grant date fair value	$ 1.63
Outstanding aggregate intrinsic value | $
Vested aggregate intrinsic value | $
Nonvested aggregate intrinsic value | $
Issued aggregate intrinsic value
Exercised aggregate intrinsic value | $
Forfeited aggregate intrinsic value
Expired aggregate intrinsic value
Outstanding aggregate intrinsic value | $	$ 24,000
Vested aggregate intrinsic value | $	24,000
Nonvested aggregate intrinsic value | $