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Note 11 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		Level 1				Level 2				Level 3				Total
December 31, 2017
Corporate bonds and notes		$	—			$	8,428			$	—			$	8,428
Municipal bonds			—				4,610				—				4,610
Total		$	—			$	13,038			$	—			$	13,038
December 31, 2016
Corporate bonds and notes		$	—			$	19,970			$	—			$	19,970
Municipal bonds			—				6,425				—				6,425
Total		$	—			$	26,395			$	—			$	26,395

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

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- References

No definition available.

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