Note 15 - Segment and Geographic - Segment and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Foreign [Member]
Net Revenues													$ 159,984	$ 188,964	$ 167,428
Net Income													11,039	21,379	4,087
Domestic [Member]
Net Revenues													157,225	149,803	168,902
Net Income													3,702	2,361	1,959
UNITED STATES
Net Revenues													75,994	85,314	89,734
FRANCE
Net Revenues													9,076	7,917	5,554
GERMANY
Net Revenues													33,215	32,866	34,423
HUNGARY
Net Revenues													2,082	2,571	3,620
ITALY
Net Revenues													4,328	4,645	4,506
NETHERLANDS
Net Revenues													3,608	2,315	2,080
RUSSIAN FEDERATION
Net Revenues													4,755	5,051	2,821
SWEDEN
Net Revenues													2,155	4,460	4,938
SWITZERLAND
Net Revenues													2,789	2,569	3,714
TURKEY
Net Revenues													2,376	2,658	2,323
UNITED KINGDOM
Net Revenues													13,502	19,832	19,524
Other Europe and the Middle East Regions [Member]
Net Revenues													14,437	15,223	15,546
CHINA
Net Revenues													79,575	83,597	83,849
INDONESIA
Net Revenues													2,128	3,224	1,914
JAPAN
Net Revenues													9,271	8,469	6,740
KOREA, REPUBLIC OF
Net Revenues													23,215	22,371	19,466
MALAYSIA
Net Revenues													4,662	5,580	3,766
SINGAPORE
Net Revenues													12,353	11,694	11,838
TAIWAN, PROVINCE OF CHINA
Net Revenues													3,151	2,688	2,962
THAILAND
Net Revenues													3,904	4,300	3,031
Other Asia Pacific Regions [Member]
Net Revenues													2,083	1,143	2,075
INDIA
Net Revenues													4,293	5,163	5,245
Other Rest of the World [Member]
Net Revenues													4,257	5,117	6,661
Net Revenues	$ 79,772		$ 75,133		$ 80,257		$ 82,047		$ 82,926	$ 81,326	$ 86,435	$ 88,080	317,209	338,767	336,330
Net Income	$ 6,197	[1]	$ 2,286	[1]	$ 3,273	[1]	$ 2,985	[1]	$ 7,796	$ 6,622	$ 5,747	$ 3,575	$ 14,741	$ 23,740	$ 6,046

[1] During the fiscal year ended March 31, 2016, we recorded out-of-period adjustments that increased the income tax provision by a net amount of $1.4 million. See Note 16, ""Income Taxes"" in the Notes to Consolidated Financial Statements in Item 8 of this Annual Report on Form 10-K for further discussion of an out-of-period adjustment during the quarter ended December 31, 2015.