Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating revenues:
Operating revenues	$ 7,970	$ 7,571	$ 23,618	$ 22,699
Operating expenses:
Cost of services and products (exclusive of depreciation and amortization expense)	3,201	2,924	9,687	8,843
Selling, general and administrative expenses	6,015	4,726	16,664	15,686
Depreciation and amortization	891	931	3,383	2,753
Restructuring costs and other special charges		600		700
Total operating expenses	10,107	9,181	29,734	27,982
Operating loss	(2,137)	(1,610)	(6,116)	(5,283)
Other income:
Interest (expense) income, net	(2)	20	10	(173)
Income from investment				52,373
Other income (expense), net	25	(4)	1,515	23
Total other income, net	23	16	1,525	52,223
(Loss) income before income taxes	(2,114)	(1,594)	(4,591)	46,940
Income tax (benefit) expense	(296)	(264)	(753)	16,982
Net (loss) income	(1,818)	(1,330)	(3,838)	29,958
Preferred dividends	6	6	19	19
Net (loss) income applicable to common stock	$ (1,824)	$ (1,336)	$ (3,857)	$ 29,939
Basic (loss) earnings per common share	$ (0.31)	$ (0.23)	$ (0.66)	$ 4.96
Diluted (loss) earnings per common share	$ (0.31)	$ (0.23)	$ (0.66)	$ 4.96
Weighted average shares of common stock used to calculate loss per common share:
Basic	5,871	5,826	5,853	5,802
Diluted	5,871	5,826	5,853	5,802
Dividends declared per common share			$ 2.60
Unified Communications [Member]
Operating revenues:
Operating revenues	$ 4,718	$ 4,308	$ 13,703	$ 12,753
Operating expenses:
Cost of services and products (exclusive of depreciation and amortization expense)	2,268	1,923	6,769	5,838
Selling, general and administrative expenses	3,624	3,048	10,361	10,059
Depreciation and amortization	529	546	2,256	1,606
Restructuring costs and other special charges		336		392
Total operating expenses	6,421	5,853	19,386	17,895
Operating loss	(1,703)	(1,545)	(5,683)	(5,142)
Telephone [Member]
Operating revenues:
Operating revenues	3,252	3,263	9,915	9,946
Operating expenses:
Cost of services and products (exclusive of depreciation and amortization expense)	933	1,001	2,918	3,005
Selling, general and administrative expenses	2,391	1,678	6,303	5,627
Depreciation and amortization	362	385	1,127	1,147
Restructuring costs and other special charges		264		308
Total operating expenses	3,686	3,328	10,348	10,087
Operating loss	$ (434)	$ (65)	$ (433)	$ (141)