Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Stock-based compensation in the form of employee stock options and restricted stock [Abstract]
Total stock-based compensation	$ 272,000	$ 334,000	$ 861,000	$ 1,004,000
Tax effect on stock-based compensation	0	0	0	0
Net effect on net income (loss)	272,000	334,000	861,000	1,004,000
Weighted average assumptions [Abstract]
Expected term	4 years 4 months 24 days		4 years 3 months 18 days
Volatility (in hundredths)	62.26%		63.10%
Expected dividend (in hundredths)	0.00%		0.00%
Risk-free interest rate (in hundredths)	1.86%		1.88%
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs related to unvested stock options not yet recognized	1,300,000		1,300,000
Value of estimated forfeitures			46,000
Weighted-average period of amortization			2 years 7 months 6 days
Number of options outstanding [Roll Forward]
Options outstanding, beginning of period (in shares)			2,671,000
Granted (in shares)	200,000,000	60,000,000	252,000	60,000
Exercised (in shares)			(112,000)
Canceled and expired (in shares)			(73,000)
Options outstanding, end of period (in shares)	2,738,000		2,738,000		2,671,000
Options vested and expected to vest as of September 30, 2014	2,738,000		2,738,000
Options exercisable as of September 30, 2014	1,688,000		1,688,000
Weighted average exercise price [Roll Forward]
Options outstanding, beginning of period (in dollars per share)			$ 3.29
Granted (in dollars per share)			$ 2.26
Exercised (in dollars per share)			$ 1.21
Canceled and expired (in dollars per share)			$ 5.18
Options outstanding, end of period (in dollars per share)	$ 3.23		$ 3.23		$ 3.29
Options vested and expected to vest as of September 30, 2014	$ 3.23		$ 3.23
Options exercisable as of September 30, 2014	$ 3.52		$ 3.52
Weighted average Remaining Contractual Life [Abstract]
Options outstanding, beginning of period			6 years 8 months 19 days		6 years 8 months 16 days
Options outstanding, end of period			6 years 8 months 19 days		6 years 8 months 16 days
Options vested and expected to vest, end of period			6 years 8 months 19 days
Option exercisable, end of period			5 years 5 months 8 days
Aggregate Intrinsic Value [Abstract]
Options outstanding, beginning of period			893,000
Options outstanding, end of period	585,000		585,000		893,000
Options vested and expected to vest, end of period	585,000		585,000
Options exercisable, end of period	505,000		505,000
Closing price (in dollars per share)	$ 2.44		$ 2.44
Weighted Average Grant Date Fair Value [Roll Forward]
Weighted-average grant date fair value of stock options granted (in dollars per share)	$ 1.08	$ 1.21	$ 1.09	$ 1.21
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period of amortization			1 year 2 months 12 days
Shares [Roll Forward]
Non-vested, beginning of period (in shares)			241,232
Granted (in shares)			55,044
Vested (in shares)			(48,420)
Non-vested, end of period (in shares)	247,856		247,856
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested, beginning of period (in dollars per share)			$ 3.44
Granted (in dollars per share)			$ 2.18
Vested (in dollars per share)			$ 4.66
Non-vested, end of period (in dollars per share)	$ 2.92		$ 2.92
Unrecognized compensation expense related to restricted stock awards	514,000		514,000
Cost of Revenue [Member]
Stock-based compensation in the form of employee stock options and restricted stock [Abstract]
Total stock-based compensation	4,000	6,000	14,000	17,000
Selling, General and Administrative [Member]
Stock-based compensation in the form of employee stock options and restricted stock [Abstract]
Total stock-based compensation	227,000	285,000	716,000	860,000
Research and Development [Member]
Stock-based compensation in the form of employee stock options and restricted stock [Abstract]
Total stock-based compensation	$ 41,000	$ 43,000	$ 131,000	$ 127,000