10. Share-Based Employee Compensation (Details 2) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Number of Options Outstanding	354,500	311,000
Weighted Average Exercise Price, outstanding	$ 4.46
Weighted Average Remaining Contractual Life (in Years)	7 years 4 months 6 days
Stock Options Exercisable	113,000
Weighted Average Exercise Price, exercisable	$ 3.75
Option 1
Exercise Price, minimum	1.89
Exercise Price, maximum	$ 3.83
Number of Options Outstanding	36,000
Weighted Average Exercise Price, outstanding	$ 2.67
Weighted Average Remaining Contractual Life (in Years)	5 years 10 months 28 days
Stock Options Exercisable	28,000
Weighted Average Exercise Price, exercisable	$ 2.33
Option 2
Exercise Price, minimum	4.07
Exercise Price, maximum	$ 5.10
Number of Options Outstanding	318,500
Weighted Average Exercise Price, outstanding	$ 4.67
Weighted Average Remaining Contractual Life (in Years)	7 years 6 months 4 days
Stock Options Exercisable	85,000
Weighted Average Exercise Price, exercisable	$ 4.21