Consolidated Statements of Changes In Net Assets - USD ($)		3 Months Ended		9 Months Ended	12 Months Ended
		Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2017
Net increase (decrease) in net assets resulting from operations			$ 619,000	$ (3,067,000)
Capital share activity
Exercise of stock options	[1]	0			0
Investment Company Accounting [Member]
Net investment loss after income taxes			(2,490,000)	(4,218,000)
Net realized gains on investments, net of tax			944,000	3,785,000
Net unrealized depreciation on investments, net of tax			2,165,000	(2,634,000)
Net increase (decrease) in net assets resulting from operations			619	(3,067)
Investment income, net			0
Return of capital			0	0
Realized gains from investment transactions, net			0
Distributions to shareholders	[2]		0	0
Stock-based compensation expense			222,000	551,000
Exercise of stock options			0	0
Capital share transactions			222,000	551,000
Total increase (decrease) in net assets			841,000	(2,516,000)
Net assets at the beginning of the period			282,739,000	286,096,000	$ 286,096,000
Net assets at the end of the period	[3]		$ 283,580,000	$ 283,580,000
Capital share activity
Capital share activity Common stock issued, beginning of period		27,294,327	27,227,291	26,976,064	26,976,064
Exercise of stock options			0	0
Issuance of restricted stock, net			(492)	250,735
Common stock issued, end of period			27,226,799	27,226,799	27,294,327
Treasury stock, beginning of period		(2,951,243)	(2,951,243)	(2,951,243)	(2,951,243)
Treasury stock acquired			0	0
Treasury stock, end of period			(2,951,243)	(2,951,243)	(2,951,243)
Common stock outstanding			24,275,556	24,275,556	24,343,084

[1] The aggregate intrinsic value, which represents the difference between the price of the Company's common stock at the exercise date and the related exercise price of the underlying options, was $0 and $0 for the 2018 and 2017 third quarter and nine months.

[2] Distributions declared were $0.00 and $0.00 per share for the three and nine months ended September 30, 2017.

[3] Includes $0 of undistributed net investment income, $0 of undistributed net realized gains on investments, and $0 of capital loss carryforwards at September 30, 2017.