Note 8. Stock Options and Restricted Stock Units (Details 1)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Number of Options Outstanding, Ending	246,000
Option 1
Exercise Price Range	0.01 - $1.00
Number of Options Outstanding, Ending	19,700
Weighted Average Exercise Price | $ / shares	$ 0.01
Weighted Average Remaining Contractual Life (in Years)	6 years 22 days
Number of Options Exercisable	19,700
Option 2
Exercise Price Range	1.01 - $2.00
Number of Options Outstanding, Ending	4,550
Weighted Average Exercise Price | $ / shares	$ 1.7
Weighted Average Remaining Contractual Life (in Years)	5 years 4 months 24 days
Number of Options Exercisable	4,550
Option 3
Exercise Price Range	2.01 - $3.00
Number of Options Outstanding, Ending	6,500
Weighted Average Exercise Price | $ / shares	$ 2.65
Weighted Average Remaining Contractual Life (in Years)	2 years 2 months 23 days
Number of Options Exercisable	1,500
Option 4
Exercise Price Range	3.01 - $4.00
Number of Options Outstanding, Ending	14,000
Weighted Average Exercise Price | $ / shares	$ 3.33
Weighted Average Remaining Contractual Life (in Years)	6 years 3 months
Number of Options Exercisable	14,000
Option 5
Exercise Price Range	4.01 - $8.00
Number of Options Outstanding, Ending	108,750
Weighted Average Exercise Price | $ / shares	$ 7.67
Weighted Average Remaining Contractual Life (in Years)	5 years 8 months 27 days
Number of Options Exercisable	55,001
Option 6
Exercise Price Range	8.01 - $9.00
Number of Options Outstanding, Ending	40,000
Weighted Average Exercise Price | $ / shares	$ 8.25
Weighted Average Remaining Contractual Life (in Years)	2 years 7 months 20 days
Number of Options Exercisable	25,000
Option 7
Exercise Price Range	9.01 - $10.00
Number of Options Outstanding, Ending	12,500
Weighted Average Exercise Price | $ / shares	$ 9.26
Weighted Average Remaining Contractual Life (in Years)	8 years 11 months 26 days
Number of Options Exercisable	3,125
Option 8
Exercise Price Range	10.01-$13.49
Number of Options Outstanding, Ending	40,000
Weighted Average Exercise Price | $ / shares	$ 13.49
Weighted Average Remaining Contractual Life (in Years)	3 years 2 months 8 days
Number of Options Exercisable	17,500
Total
Number of Options Outstanding, Ending	246,000
Weighted Average Exercise Price | $ / shares	$ 7.69
Weighted Average Remaining Contractual Life (in Years)	4 years 11 months 8 days
Number of Options Exercisable	140,376