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Debt and Line of Credit (Narrative) (Details) - USD ($)				9 Months Ended	12 Months Ended
	Aug. 23, 2016	Aug. 15, 2016	Aug. 05, 2016	Oct. 30, 2016	Feb. 01, 2015	Oct. 07, 2016	May 31, 2014
Mortgage Note Due March 2017 [Member]
Debt Instrument [Line Items]
Remaining outstanding debt balance paid off	$ 3,100,000
Mortgage Note Due May 2019 [Member]
Debt Instrument [Line Items]
Debt, original balance					$ 600,000
Debt instrument, maturity date					May 31, 2019
Required monthly principal payments					$ 5,300
Remaining outstanding debt balance paid off		$ 500,000
Debt instrument stated percentage interest rate					4.00%
Amended And Restated [Member]
Debt Instrument [Line Items]
Debt instrument, effective rate				1.80%
Line of credit maturity date				Jul. 31, 2019
Amended And Restated [Member] | October 7, 2016 through July 31, 2017 [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity						$ 40,000,000
Amended And Restated [Member] | August 1, 2017 through July 31, 2018 [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity						50,000,000
Amended And Restated [Member] | August 1, 2018 through July 31, 2019 [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity						$ 60,000,000
SRV [Member] | SRV Mortgage Note Due September 2017 [Member]
Debt Instrument [Line Items]
Debt, original balance				$ 800,000
Debt instrument, maturity date				Sep. 30, 2017
Required monthly principal payments				$ 3,300
Debt instrument stated percentage interest rate				3.10%
SRV [Member] | SRV Mortgage Note Due August 2016 [Member]
Debt Instrument [Line Items]
Debt, original balance				$ 500,000
Debt instrument, maturity date				Aug. 31, 2016
Required monthly principal payments				$ 3,400
Remaining outstanding debt balance paid off			$ 400,000
Debt instrument stated percentage interest rate				4.50%
SE [Member] | Mortgage Note Due March 2017 [Member]
Debt Instrument [Line Items]
Debt, original balance							$ 3,800,000
Debt instrument, maturity date				Mar. 31, 2017
Required monthly principal payments				$ 11,900
SE [Member] | Mortgage Note Due March 2017 [Member] | London interbank offered rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, percentage point added to LIBOR rate				1.25%

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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-Section 45
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Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount of the required periodic payments applied to principal.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The cash outflow for a borrowing supported by a written promise to pay an obligation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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