Revision - Impact of Correction of Errors on Unaudited Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018
Current assets:
Cash and cash equivalents	$ 26,669		$ 10,141	$ 18,925
Trade accounts and financing receivables, net	14,619		27,205	27,426
Inventories	21,531		23,907	23,855
Property held for sale	603		691
Prepaid expenses and other current assets	1,426		1,971	1,008
Total current assets	64,848		63,915	71,214
Non-current inventories	13,581		19,223	21,524
Rental equipment, net	58,571		66,985	62,062
Property, plant and equipment, net	30,511		31,615	31,474
Goodwill	5,008		5,008	5,008
Other intangible assets, net	8,764		9,630	10,063
Deferred cost of revenue and other assets	8,108		807	663
Total assets	189,391		197,183	202,008
Total liabilities	24,925		26,461	23,161
Stockholders’ equity:
Preferred stock, 1,000,000 shares authorized, no shares issued and outstanding
Common stock, $.01 par value, 20,000,000 shares authorized, 13,664,614 and 13,630,666 shares issued and outstanding	137		137	136
Additional paid-in capital	90,342		89,250	88,660
Retained earnings	90,430		96,526	105,808
Accumulated other comprehensive loss	(16,443)		(15,191)	(15,757)
Total stockholders’ equity	164,466	$ 166,427	170,722	178,847	$ 170,024	$ 172,953	$ 171,397	$ 176,587
Total liabilities and stockholders’ equity	$ 189,391		197,183	$ 202,008
As Reported
Current assets:
Cash and cash equivalents			10,141
Trade accounts and financing receivables, net			35,198
Inventories			23,907
Property held for sale			691
Prepaid expenses and other current assets			1,971
Total current assets			71,908
Non-current inventories			19,223
Rental equipment, net			66,985
Property, plant and equipment, net			31,615
Goodwill			5,008
Other intangible assets, net			9,630
Deferred cost of revenue and other assets			807
Total assets			205,176
Total liabilities			26,461
Stockholders’ equity:
Preferred stock, 1,000,000 shares authorized, no shares issued and outstanding
Common stock, $.01 par value, 20,000,000 shares authorized, 13,664,614 and 13,630,666 shares issued and outstanding			137
Additional paid-in capital			89,250
Retained earnings			104,519
Accumulated other comprehensive loss			(15,191)
Total stockholders’ equity			178,715
Total liabilities and stockholders’ equity			205,176
Adjustment
Current assets:
Trade accounts and financing receivables, net			(7,993)
Total current assets			(7,993)
Total assets			(7,993)
Stockholders’ equity:
Preferred stock, 1,000,000 shares authorized, no shares issued and outstanding
Retained earnings			(7,993)
Total stockholders’ equity			(7,993)
Total liabilities and stockholders’ equity			$ (7,993)