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Note K - Deferred Revenue	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Deferred Revenue Disclosure [Text Block]	NOTE K —DEFERRED REVENUE Deferred revenue represents unearned revenue on maintenance contracts. Maintenance contracts include provisions for unspecified when-and-if available product updates and customer telephone support services, and are recognized ratably over the term of the service period. At December 31, 2017 and 2016, amounts in deferred revenue were approximately $508,000 and $633,000, respectively.

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- Definition

The entire disclosure for deferred revenues at the end of the reporting period, and description and amounts of significant changes that occurred during the reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 430
-URI http://asc.fasb.org/topic&trid=2122452

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- References

No definition available.

+ Details

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