Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing receivables, current, net of allowances of $526, respectively	$ 526	$ 526
Accounts receivable, allowances	$ 45	$ 524
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	500,000	500,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,291,494	5,113,400
Common stock, shares outstanding (in shares)	5,278,778	5,100,684
Treasury stock, shares (in shares)	12,716	12,716
9% Preferred Stock, Series A, Voting, Cumulative, Convertible
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	4,500	4,500
Preferred stock, issued (in shares)	2,056	2,678
Preferred stock, dividend rate (usd per share)	9.00%	9.00%
5% Preferred Stock, Series B, Voting, Cumulative, Convertible
Preferred stock liquidation preference, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, dividend rate (usd per share)	5.00%	5.00%