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Note 1 - Scheduled Maturity for the Company's Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Maturing in one year or less	$ 22,664	$ 18,232
Maturing after one year through two years	28,395	25,459
Maturing after two years	19,288	15,657
Total investments	$ 70,347	$ 59,348

X

- Definition

Represents available for sale securities debt maturities after one through two years fair value.

+ References

No definition available.

+ Details

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X

- Definition

Represents debt maturities after two years.

+ References

No definition available.

+ Details

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X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562

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X

- Definition

Fair value of available-for-sale debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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