Earnings (Loss) Per Common Share - Additional Information (Details) - shares	3 Months Ended	9 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Loss Per Common Share [Line Items]
Weighted Average Number of Shares Outstanding, Diluted	17,522,644	17,221,199	17,426,316	17,147,228
Restricted stock [Member]
Earnings Loss Per Common Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	25,000	60,000	25,000	60,000
Employee stock purchase plan [Member]
Earnings Loss Per Common Share [Line Items]
Weighted Average Number of Shares Outstanding, Diluted	95,602	160,537	95,602	160,537

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1505-109256

Name:	us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration