Note 5 - Business Acquisition (Details Textual) - Private Software Company [Member] - USD ($) $ in Thousands		3 Months Ended	6 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2017	Jun. 30, 2010
Business Combination, Consideration Transferred		$ 3,600		$ 1,500
Business Acquisition, Percentage of Voting Interests Acquired		64.00%		36.00%
Payments to Acquire Businesses, Gross		$ 1,800
Business Combination, Consideration Transferred, Liabilities Incurred		$ 1,800
Business Combination, Consideration Transferred, Subsequent Period		3 years
Business Combination, Consideration Transferred, Liabilities Incurred, Discounted		$ 1,600
Business Combination, Operating Profits, Percentage		30.00%
Business Combination, Operating Profits, Term		3 years
Business Combination, Consideration Transferred, Discounted Rate				5.00%
Business Combination, Consideration Transferred, Total Cash Considerations Before Noncontrolling Interest Rate			$ 3,388
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	[1]		$ 5,294

[1] $1,833 + 1,555 ($1.8 million discounted at 5%) = $3,388 purchase price divided by 64% = $5.294 million.