Note J - Fair Value Measurements (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Liabilities:
Total liabilities	$ 6,613,000	$ 6,496,000
Level 1
Assets:
Investments	2,977,000	5,262,000
Total assets measured at fair value	2,977,000	5,262,000
Liabilities:
Foreign currency hedge contracts	0	0
Total liabilities	0	0
Level 2
Assets:
Investments	500,000	1,501,000
Total assets measured at fair value	500,000	1,501,000
Liabilities:
Foreign currency hedge contracts	(15,000)	0
Total liabilities	(15,000)	0
Level 3
Assets:
Investments	0	0
Total assets measured at fair value	0	0
Liabilities:
Foreign currency hedge contracts	0	0
Total liabilities	$ 0	$ 0