Quarterly Information (Schedule Of Quarterly Effect Of Income Statement Restatement) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended															6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013	Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Selling, general and administration expenses			$ 5,115		$ 6,226	$ 7,248										$ 13,474	$ 18,589	$ 23,989		$ 23,702		$ 17,558
Total operating expenses			9,629		10,402	12,039										22,441	32,070	41,716		52,195		37,525
Operating loss	(2,261)		(2,099)	[1]	(2,955)	(4,299)		(13,633)	[2]	(4,019)	[1],[2]	(3,447)	[2]	(3,154)	[2]	(7,254)	(9,353)	(11,614)		(24,253)	[2]	(11,589)
Income (loss) before income taxes			997		146	(1,177)										(1,031)	(34)	796		(13,933)		(3,806)
Income taxes expense (benefit)			654		155	(506)										(351)	303	1,442		(3,044)		(885)
Net income (loss)	(309)		343	[1]	(9)	(671)		(8,505)	[2]	(922)	[1],[2]	(228)	[2]	(1,234)	[2]	(680)	(337)	(646)		(10,889)	[2]	(2,921)
Net income (loss) applicable to common stock			337		(16)	(677)										(693)	(356)	(671)		(10,914)		(2,946)
Basic income (loss) per share	$ (0.05)		$ 0.06	[1]		$ (0.12)		$ (1.49)	[2]	$ (0.16)	[1],[2]	$ (0.04)	[2]	$ (0.22)	[2]	$ (0.12)	$ (0.06)	$ (0.11)		$ (1.91)	[2]	$ (0.54)
Diluted income (loss) per share	$ (0.05)	[3]	$ 0.06	[1],[3]		$ (0.12)	[3]	$ (1.49)	[2],[3]	$ (0.16)	[1],[2],[3]	$ (0.04)	[2],[3]	$ (0.22)	[2],[3]	$ (0.12)	$ (0.06)	$ (0.11)	[3]	$ (1.91)	[2],[3]	$ (0.54)
As Previously Reported [Member]
Selling, general and administration expenses			5,218		6,329	7,352										13,681	18,899
Total operating expenses			9,732		10,505	12,143										22,648	32,380
Operating loss			(2,202)		(3,058)	(4,403)										(7,461)	(9,663)
Income (loss) before income taxes			894		43	(1,281)										(1,238)	(344)
Income taxes expense (benefit)			331		3	(448)										(445)	(114)			(4,481)
Net income (loss)			563		40	(833)										(793)	(230)			(9,452)
Net income (loss) applicable to common stock			557		33	(839)										(806)	(249)			(9,477)
Basic income (loss) per share			$ 0.09		$ 0.01	$ (0.15)										$ (0.14)	$ (0.04)			$ (1.66)
Diluted income (loss) per share			$ 0.09		$ 0.01	$ (0.15)										$ (0.14)	$ (0.04)			$ (1.66)
Correction Of Errors [Member]
Selling, general and administration expenses			(103)		(103)	(104)										(207)	(310)
Total operating expenses			(103)		(103)	(104)										(207)	(310)
Operating loss			103		103	104										207	310
Income (loss) before income taxes			103		103	104										207	310
Income taxes expense (benefit)			323		152	(58)										94	417			1,437
Net income (loss)			(220)		(49)	162										113	(107)			(1,437)
Net income (loss) applicable to common stock			$ (220)		$ (49)	$ 162										$ 113	$ (107)			$ (1,437)
Basic income (loss) per share			$ (0.03)		$ (0.01)	$ 0.03										$ 0.02	$ (0.02)			$ (0.25)
Diluted income (loss) per share			$ (0.03)		$ (0.01)	$ 0.03										$ 0.02	$ (0.02)			$ (0.25)

[1] Included in operating loss and net loss is $0.4 million loss on disposal and restructuring costs.

[2] The Company recorded an additional $1.4 milion in tax expense, compared to what was previously reported in its Annual Report on Form 10-K/A for the year ended December 31, 2012 (see Note 1).

[3] There is no difference between basic and diluted earnings (loss) per share due to stock options being out of the money.