Note 11. Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory tax rate	21.00%	34.00%
Federal statutory tax rate, amount	$ 254	$ 681
State tax rate	4.60%	1.00%
State tax rate, amount	$ 55	$ 21
Permanent difference - stock-based compensation	(0.10%)	(7.80%)
Permanent difference - stock-based compensation, amount	$ (2)	$ (156)
Permanent difference - other	0.10%	3.10%
Permanent difference - other, amount	$ 4	$ 63
Tax reform deferred re-measurement	0.00%	(17.50%)
Tax reform deferred re-measurement, amount	$ 0	$ (351)
Provision to return	7.90%	(0.10%)
Provision to return, amount	$ 96	$ (3)
Tax on foreign earnings - tax reform	3.50%	0.00%
Tax on foreign earnings - tax reform, amount	$ 41	$ 0
Foreign rate differential	0.10%	(2.00%)
Foreign rate differential, amount	$ 2	$ (41)
Research and development credit	(6.30%)	(3.50%)
Research and development credit, amount	$ (77)	$ (70)
Subtotal	30.80%	7.20%
Subtotal, amount	$ 373	$ 144
Change in valuation allowance	0.00%	(0.70%)
Change in valuation allowance, amount	$ 0	$ (13)
Total	30.80%	6.50%
Total, amount	$ 373	$ 131