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Note 2 - Accounts Receivable	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Financing Receivables [Text Block]	2. Accounts Receivable: Accounts receivable are presented net of allowances for doubtful accounts and unissued credits of $2.8 million and $2.4 million as of December 31, 2017 and 2016, respectively. Bad debt expense totaled $0.6 million, $0.4 million and $0.5 million in 2017, 2016 and 2015, respectively. The Company ’s allowance for doubtful accounts is maintained at a level considered appropriate based on historical experience and specific customer collection issues that the Company has identified. Estimations are based upon a calculated percentage of accounts receivable, which remains fairly level from year to year, and judgments about the probable effects of economic conditions on certain customers, which can fluctuate significantly from year to year. The Company cannot guarantee that the rate of future credit losses will be similar to past experience. The Company considers all available information when assessing the adequacy of its allowance for doubtful accounts.

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- Definition

The entire disclosure for financing receivables. Examples of financing receivables include, but are not limited to, loans, trade accounts receivables, notes receivable, credit cards, and receivables relating to a lessor's right(s) to payment(s) from a lease other than an operating lease that is recognized as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-URI http://asc.fasb.org/topic&trid=2196771

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