Consolidated Statement of Stockholders' Equity (USD $) Share data in Thousands, unless otherwise specified	Total	Common Stock	Class B Common Stock	Common Stock	Class B Common Stock	Par Value	Additional Paid-in Capital	Common Stock in Treasury	Retained Earnings	Retained Earnings Common Stock	Retained Earnings Class B Common Stock	Accumulated Other Comprehensive Income (loss)
Beginning Balance at May. 31, 2014	$ 174,845,000					$ 702,000	$ 66,141,000	$ (14,000)	$ 97,959,000			$ 10,057,000
Beginning Balance (in shares) at May. 31, 2014				11,835	2,191
Net income (loss)	(3,338,000)								(3,338,000)
Foreign currency translation	(6,149,000)											(6,149,000)
Fair value adjustments on investments	30,000											30,000
Share-based compensation:
Stock options	529,000						529,000
Common stock:
Options Exercised	301,000			46,000		2,000	299,000
Canceled Shares					(50)
Stock Issued During Period, Shares, Conversion of Convertible Securities				50
Repurchase of common stock	(3,945,000)							(3,945,000)
Treasury stock retirements				(401,000)	0	(20,000)	(3,939,000)	3,959,000
Other	0			(1,000)		(1,000)	1,000	0
Dividends paid
Dividends declared to common stock		(2,103,000)	(350,000)							(2,103,000)	(350,000)
Ending Balance at Feb. 28, 2015	$ 159,820,000					$ 683,000	$ 63,031,000	$ 0	$ 92,168,000			$ 3,938,000
Ending Balance (in shares) at Feb. 28, 2015				11,529	2,141