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Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended			15 Months Ended
	Mar. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 $ / shares	Sep. 30, 2020 $ / shares	Jun. 30, 2020 USD ($) $ / shares	Mar. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 $ / shares	Sep. 30, 2019 $ / shares	Jun. 30, 2019 $ / shares	Mar. 31, 2021 USD ($) $ / shares	Mar. 31, 2020 USD ($) $ / shares	Mar. 31, 2019 USD ($) $ / shares	Jun. 30, 2020 USD ($)	Apr. 01, 2020 USD ($)	Aug. 12, 2019 USD ($)
Number of Operating Segments									4
Accounts Receivable, Credit Loss Expense (Reversal)									$ 100	$ 1	$ 13
Payments to Acquire Businesses, Net of Cash Acquired, Total									0	184,102	4,840
Goodwill, Impairment Loss									0	258
Cost of Revenue, Total									46,923	52,325	42,219
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	$ 16,116				$ (10,369)				16,116	(10,369)
Operating Income (Loss), Total									$ 12,358	$ 7,923	$ 9,781
Earnings Per Share, Diluted, Total (in dollars per share) | $ / shares	$ 0.74	$ (0.89)	$ 0.51	$ 0.26	$ (0.37)	$ (1.03)	$ 0.73	$ 1.14	$ 0.64	$ 0.41	$ 1.86
Retained Earnings (Accumulated Deficit), Ending Balance	$ 72,459				$ 72,359				$ 72,459	$ 72,359
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Retained Earnings (Accumulated Deficit), Ending Balance													$ (9)
Immaterial Error Correction [Member] | Revision of Prior Period, Error Correction, Adjustment [Member]
Cost of Revenue, Total										(429)		$ (372)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total					$ (429)					(429)
Operating Income (Loss), Total										$ 429
Earnings Per Share, Diluted, Total (in dollars per share) | $ / shares				$ 0.04						$ 0.10
Net Income (Loss) Attributable to Parent, Total												192
Retained Earnings (Accumulated Deficit), Ending Balance				$ 192								$ 192
Equity Plan 2014 [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)									1 year
Equity Plan 2014 [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)									6 years
The Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.375%				1.375%				1.375%	1.375%
Interest Expense, Debt, Total									$ 7,769	$ 4,816
The Notes [Member] | Senior Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.375%								1.375%					1.375%
Debt Instrument, Convertible, Carrying Amount of Equity Component, Net of Issuance Costs	$ 30,092								$ 30,092
Debt Instrument, Convertible, Carrying Amount of Equity Component	31,073				$ 31,073				31,073	$ 31,073				$ 31,073
Debt Issuance Costs, Gross, Equity Component	981								981
Debt Instrument, Unamortized Discount, Equity Component, Total	$ 22,799								22,799
Interest Expense, Debt, Total									$ 7,293
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)									5 years
Minimum [Member] | Equity Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)									3 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)									15 years
Maximum [Member] | Equity Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)									5 years

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