Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Note 7 - Equity Plans (Details Textual) - USD ($)				3 Months Ended	6 Months Ended	9 Months Ended
Note 7 - Equity Plans (Details Textual) - USD ($)	Jul. 01, 2016	May 01, 2016	Mar. 01, 2015	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		1 year	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		3,094	4,639
Match [Member] \| Senior Management Compensation Program [Member]
Shares Matched						2,500	8,750
Restricted Stock Units (RSUs) [Member] \| Senior Management Compensation Program [Member] \| Five Year Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested						$ 25,000
Restricted Stock Units (RSUs) [Member] \| Senior Management Compensation Program [Member] \| Ten Year Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested						50,000
Restricted Stock Units (RSUs) [Member] \| Senior Management Compensation Program [Member] \| Fifteen Year Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested						75,000
Restricted Stock Units (RSUs) [Member] \| Senior Management Compensation Program [Member] \| Twenty Five Year Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested						100,000
Restricted Stock Units (RSUs) [Member] \| Senior Management Compensation Program [Member] \| Twenty Year Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested						$ 100,000
Restricted Stock Units (RSUs) [Member] \| Senior Management Compensation Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Remaining Liability Reversed					$ 880,000
Restricted Stock Units (RSUs) [Member] \| Senior Management Stock Incentive Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Participant's Base Salary	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Amount Per Employee	$ 17,500
Restricted Stock Units (RSUs) [Member] \| Executive Vice President and Chief Operating Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				10,573
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period						137,935
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested						$ 1,579,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant				1,000,000		1,000,000
Share Price		$ 22.62	$ 15.09
Senior Management Compensation Program [Member]
ShareBased Compensation Arrangement by ShareBased Payment Award Minimum Number of Shares Per Employee						750
Sharebased Compensation Arrangement bySharebasedPaymentAwardMatchingPurchaseRequirement						500
Sharebased Compensation Arrangement by Sharebased Payment Award Award Match						250
Restricted Stock Units Units Number Converted						3,239	2,437