Note 3. Stock Options and Restricted Stock Units (Details)	3 Months Ended
	Mar. 31, 2017 $ / shares shares
Option 1
Exercise Price Range	0.01 - $1.00
Number of Options Outstanding	7,850
Weighted Average Remaining Contractual Life (in Years)	4 years 9 months 22 days
Weighted Average Exercise Price | $ / shares	$ 0.01
Number of Options Exercisable	7,850
Option 2
Exercise Price Range	1.01 - $4.00
Number of Options Outstanding	3,000
Weighted Average Remaining Contractual Life (in Years)	5 years
Weighted Average Exercise Price | $ / shares	$ 3.33
Number of Options Exercisable	3,000
Option 3
Exercise Price Range	4.01 - $7.00
Number of Options Outstanding	10,000
Weighted Average Remaining Contractual Life (in Years)	8 years 7 months 20 days
Weighted Average Exercise Price | $ / shares	$ 6.8
Number of Options Exercisable	3,333
Option 4
Exercise Price Range	7.01 - $8.00
Number of Options Outstanding	78,750
Weighted Average Remaining Contractual Life (in Years)	3 years 5 months 12 days
Weighted Average Exercise Price | $ / shares	$ 7.76
Number of Options Exercisable	68,750
Option 5
Exercise Price Range	8.01 - $10.00
Number of Options Outstanding	11,000
Weighted Average Remaining Contractual Life (in Years)	7 years 8 months 27 days
Weighted Average Exercise Price | $ / shares	$ 9.26
Number of Options Exercisable	7,330
Option 6
Exercise Price Range	10.01 - $13.49
Number of Options Outstanding	40,000
Weighted Average Remaining Contractual Life (in Years)	1 year 11 months 8 days
Weighted Average Exercise Price | $ / shares	$ 13.49
Number of Options Exercisable	30,000
Total
Number of Options Outstanding	150,600
Weighted Average Remaining Contractual Life (in Years)	3 years 9 months 18 days
Weighted Average Exercise Price | $ / shares	$ 8.83
Number of Options Exercisable	120,263