Note 5 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Net operating loss carry forwards	$ 1,274	$ 1,313
Federal Research and Development Credit	240	240
Deferred revenue	109	360
Accrued payroll	73
Allowance for doubtful accounts and other receivable	36	59
Share-based compensation expense	545	646
Foreign subsidiaries	441	588
Depreciation	396	360
Other	356	26
Federal Alternative Minimum Tax		156
Total deferred tax assets	3,470	3,748
Deferred tax liabilities:
Goodwill	76	224
Intangible assets of subsidiaries	513
Capitalized software development costs	479	469
Total deferred tax liabilities	1,068	693
Net deferred taxes	$ 2,402	$ 3,055