Note G - Derivative Instruments - The Fair Value of the Derivative Instruments (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Foreign Exchange Forward Contracts and Put Options [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Assets (Liabilities), at Fair Value, Net	$ 0	$ (36,000)
Foreign Exchange Forward Contracts and Put Options [Member] \| Other Accounts Receivable [Member]
Derivative Assets (Liabilities), at Fair Value, Net	88,000	0
Derivative Assets (Liabilities), at Fair Value, Net	$ 88,000	$ (36,000)

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Name:	us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant