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Stock Compensation Plans: Stock Options by Exercise Price (Details) - Stock Options shares in Thousands	6 Months Ended
	Mar. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	338,220
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 10.21
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	7 years 5 months 12 days
Options Exercisable, Number (shares) | shares	121,470
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 8.15
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	6 years 4 months 9 days
$4.01 - $4.55
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	11,400
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 4.25
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 9 months
Options Exercisable, Number (shares) | shares	11,400
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 4.25
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	3 years 9 months
Weighted Average Exercise Price, minimum (dollars per share)	$ 4.01
Weighted Average Exercise Price, maximum (dollars per share)	$ 4.55
$5.86 - $6.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	44,200
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 5.93
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	5 years 6 months 15 days
Options Exercisable, Number (shares) | shares	32,400
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 5.93
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	5 years 6 months 15 days
Weighted Average Exercise Price, minimum (dollars per share)	$ 5.86
Weighted Average Exercise Price, maximum (dollars per share)	$ 6.00
$9.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	83,600
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 9.00
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 6 months 30 days
Options Exercisable, Number (shares) | shares	45,200
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 9.00
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	6 years 6 months 30 days
Weighted Average Exercise Price, minimum (dollars per share)	$ 9.00
$10.26 - $10.71
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	143,270
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 10.58
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	8 years 15 days
Options Exercisable, Number (shares) | shares	32,470
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 10.53
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	7 years 9 months 9 days
Weighted Average Exercise Price, minimum (dollars per share)	$ 10.26
Weighted Average Exercise Price, maximum (dollars per share)	$ 10.71
$15.67
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	55,750
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 15.67
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	9 years 6 months
Options Exercisable, Number (shares) | shares	0
Weighted Average Exercise Price, minimum (dollars per share)	$ 15.67

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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-Publisher FASB
-Name Accounting Standards Codification
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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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-Publisher FASB
-Name Accounting Standards Codification
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+ References

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-Publisher FASB
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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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-Publisher FASB
-Name Accounting Standards Codification
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