Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Income Tax Provision Attributable to Income from Continuing Operations (Details)

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Income Taxes - Schedule of Income Tax Provision Attributable to Income from Continuing Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Income Tax Disclosure [Abstract]                        
Statutory federal income tax rate                 35.00% 24.53% 35.00%  
Tax at the statutory federal rate                   $ 3,198 $ (4,670) $ 4,382
Increase (decrease) resulting from:                        
State income taxes, net of federal benefit                   857 (402) 457
Permanent and other reconciling items, net                   221 548 773
Expiration of capital loss carryforward                   5,634 581 0
Reduction in deferred tax liability resulting from the Act                   (9,847) 0 0
Stock option cancellation                   347 0 0
Other                   (20) 97 (91)
Provision (benefit) for income taxes $ (284) $ 4,941 $ 8,150 $ (12,417) $ (10,559) $ 3,665 $ 4,321 $ (1,273)   $ 390 $ (3,846) $ 5,521