Stockholders' Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 01, 2011
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)	615,447	180,301
Average exercise price of employee stock options exercised (in dollars per share)	$ 0.08	$ 0.06
Proceeds from exercise of employee stock options	$ 49,800	$ 10,600
Private Placement [Abstract]
Common stock issued to accredited investors (in shares)		35,500,000
Term of warrants		5 years
Common stock convertible from warrants (in shares)		17,750,000
Exercise price of warrants (in dollars per share)		$ 0.26
Gross proceeds of private placement recorded in financial statements [Abstract]
Gross cash proceeds		7,100,000
Less [Abstract]
Gross proceeds allocated to warrants liability - investors		(2,999,700)
Gross proceeds allocated to additional paid-in capital and common stock		4,100,300
Cash issuance costs [Abstract]
Placement Agent fee and expenses		(766,500)
Legal and accounting fees		(208,000)
Non-cash issuance costs [Abstract]
Warrants liability - Placement Agent fees		(901,000)
Recorded in additional paid-in capital and common stock		2,224,800
Number of shares called by warrants issued to placement agent at exercise price one (in shares)		3,550,000
Warrants issued to placement agent, exercise price one (in dollars per share)		$ 0.20
Number of shares called by warrants issued to placement agent at exercise price two (in shares)		1,775,000
Warrants issued to placement agent, exercise price two (in dollars per share)		$ 0.26
Placement agent fee		710,000
Reimbursement of expenses to placement agent		56,500
Warrants liability	7,390,100	3,696,600	3,900,700
Tender Offer [Abstract]
Minimum exercise price to voluntarily exchange options to purchase shares of common stock (in dollars per share)		$ 0.20
Number of eligible options tendered and accepted (in shares)		3,447,500
Percentage of eligible options tendered and accepted (in hundredths)		84.00%
Number of new options granted in exchange for tendered options (in shares)		3,447,500
Exercise price of new options granted in exchange for tendered options (in dollars per share)		$ 0.202
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of the options granted (in dollars per share)	$ 0.22	$ 0.11
Stock-based compensation expense	972,400	263,100
Stock Repurchase Program [Abstract]
Board approved authorized amount for stock repurchase program	1,000,000
Remaining amount available for future stock repurchase program plan	782,600
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	5,312,500	8,428,500
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)	11,636,694	7,322,933
Granted (in shares)	5,312,500	8,428,500
Exercised (in shares)	(615,447)	(180,301)
Forfeited or expired (in shares)	(2,159,747)	(3,934,438)
Options outstanding at end of period (in shares)	14,174,000	11,636,694
Exercisable at year-end (in shares)	14,174,000	11,636,694
Vested or expected to vest at year-end (in shares)	13,901,838	11,455,294
Weighted Average Exercise Price [Abstract]
Outstanding at beginning of period (in dollars per share)	$ 0.18	$ 0.27
Granted (in dollars per share)	$ 0.22	$ 0.20
Exercised (in dollars per share)	$ 0.08	$ 0.06
Forfeited or expired (in dollars per share)	$ 0.20	$ 0.39
Outstanding at end of period (in dollars per share)	$ 0.20	$ 0.18
Exercisable at year-end (in dollars per share)	$ 0.20	$ 0.18
Vested or expected to vest at year-end (in dollars per share)	$ 0.20	$ 0.18
Weighted average fair value of options granted during the period (in dollars per share)	$ 0.22	$ 0.11
Options exercisable were vested (in shares)	6,803,675	3,586,444
Weighted average remaining contractual term of options	7 years 2 months 19 days
Aggregate intrinsic value of options	2,422,200
Options estimated to vest in future (in shares)	7,098,163
Options estimated to be forfeited or to expire in future periods (in shares)	272,162
Unrecognized compensation cost	625,400
Weighted-average period unrecognized compensation cost to be recognized	2 years 8 months
Unreleased Stock Awards, Shares Outstanding [Abstract]
Beginning unreleased (in shares)	0
Awarded (in shares)	4,157,000
Released (in shares)	(114,377)
Forfeited (in shares)	0
Ending unreleased (in shares)	4,043,123	0
Weighted Average Fair Value, Unreleased Stock Awards [Abstract]
Beginning unreleased	$ 0
Weighted Average Fair Value, Unreleased Stock Awards, Awarded	$ 0.18
Weighted Average Fair Value, Unreleased Stock Awards, Released	$ 0.18
Weighted Average Fair Value, Unreleased Stock Awards, Forfeited	$ 0
Ending unreleased	$ 0.18	$ 0
Awards estimated to be released in future periods	3,816,606
Awards estimated to be forfeited in future periods		226,517
Closing stock price (in shares)	$ 0.37
Aggregate fair market value of unreleased stock awards	1,495,955
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding (in shares)	14,174,000
Weighted average remaining contractual life	7 years 2 months 19 days
Weighted average exercise price (in dollars per share)	$ 0.20
Options exercisable (in shares)	14,174,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.20
Restricted common stock awarded (in shares)	4,157,500
Exercise Price Range $0.05 - $0.17 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	$ 0.05
Exercise price range, upper limit (in dollars per share)	$ 0.17
Options outstanding (in shares)	3,737,000
Weighted average remaining contractual life	7 years 4 months 13 days
Weighted average exercise price (in dollars per share)	$ 0.11
Options exercisable (in shares)	3,737,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.11
Exercise Price Range $0.18 - $0.20 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	$ 0.18
Exercise price range, upper limit (in dollars per share)	$ 0.20
Options outstanding (in shares)	4,419,500
Weighted average remaining contractual life	6 years 3 months 7 days
Weighted average exercise price (in dollars per share)	$ 0.20
Options exercisable (in shares)	4,419,500
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.20
Exercise Price Range $0.21 - $0.23 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	$ 0.21
Exercise price range, upper limit (in dollars per share)	$ 0.23
Options outstanding (in shares)	4,167,500
Weighted average remaining contractual life	7 years 3 months 18 days
Weighted average exercise price (in dollars per share)	$ 0.23
Options exercisable (in shares)	4,167,500
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.23
Exercise Price Range $0.25 - $0.38 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	$ 0.25
Exercise price range, upper limit (in dollars per share)	$ 0.38
Options outstanding (in shares)	1,850,000
Weighted average remaining contractual life	9 years 4 days
Weighted average exercise price (in dollars per share)	$ 0.31
Options exercisable (in shares)	1,850,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.31
Executive employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares of common stock issued (in shares)	3,764,500
Entity Number of Employees	3
Non-Officer Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of the options granted (in dollars per share)		$ 0.17
Estimated volatility (in hundredths)		182.00%
Annualized forfeiture rate (in hundredths)		2.44%
Expected option term		10 years
Estimated exercise factor		5
Risk free interest rate (in hundredths)		2.98%
Expected dividend		0
Weighted Average Exercise Price [Abstract]
Weighted average fair value of options granted during the period (in dollars per share)		$ 0.17
Officers and Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of the options granted (in dollars per share)		$ 0.19
Estimated exercise factor		15
Weighted Average Exercise Price [Abstract]
Weighted average fair value of options granted during the period (in dollars per share)		$ 0.19
Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares of common stock issued (in shares)	393,000
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	790,000	2,931,000
Shares Outstanding [Abstract]
Granted (in shares)	790,000	2,931,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Restricted common stock awarded (in shares)	393,000
Non-Executive Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares of common stock issued (in shares)		225,000
Entity Number of Employees		2
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		2 years
Expected additional stock-based compensation expense, net of estimated forfeitures		130,100
Stock-based compensation expense	56,400	39,900
Stock-Based Compensation Plans [Abstract]
Vesting period		2 years
Weighted Average Exercise Price [Abstract]
Unrecognized compensation cost	$ 592,900
Weighted-average period unrecognized compensation cost to be recognized	14 months
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	33 months
Stock-Based Compensation Plans [Abstract]
Vesting period	33 months
Period of no shares vesting	3 months
2005 Equity Incentive Plan [Member]
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)	25,000	0
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	350,000	300,000
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)	1,705,000	2,115,000
Granted (in shares)	350,000	300,000
Exercised (in shares)	(25,000)	0
Cancelled (in shares)	(582,500)	(710,000)
Options outstanding at end of period (in shares)	1,447,500	1,705,000
2008 Equity Incentive Plan [Member]
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)	390,447	180,301
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	4,262,500	8,128,500
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)	9,469,194	1,855,333
Granted (in shares)	4,262,500	8,128,500
Exercised (in shares)	(390,447)	(180,301)
Cancelled (in shares)	(1,457,247)	(334,338)
Options outstanding at end of period (in shares)	11,884,000	9,469,194
1998 Stock Option/Stock Issuance Plan [Member]
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)	200,000	0
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	0	0
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)	432,500	2,691,600
Granted (in shares)	0	0
Exercised (in shares)	(200,000)	0
Cancelled (in shares)	(95,000)	(2,259,100)
Options outstanding at end of period (in shares)	137,500	432,500
Supplemental Stock Option Agreement [Member]
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)	0	0
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	0	0
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)	30,000	381,000
Granted (in shares)	0	0
Exercised (in shares)	0	0
Cancelled (in shares)	(25,000)	(351,000)
Options outstanding at end of period (in shares)	5,000	30,000
GG Stock Option Plan [Member]
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)		0
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)		0
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)		250,000
Granted (in shares)		0
Exercised (in shares)		0
Cancelled (in shares)		(250,000)
Options outstanding at end of period (in shares)		0
1996 Stock Option Plan [Member]
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)		0
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)		0
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)		30,000
Granted (in shares)		0
Exercised (in shares)		0
Cancelled (in shares)		(30,000)
Options outstanding at end of period (in shares)		0
Total - Inactive Plans [Member]
Common Stock [Abstract]
Common stock issued as a result of exercise of employee stock options (in shares)	615,447	180,301
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	4,612,500	8,428,500
Shares Outstanding [Abstract]
Options outstanding at beginning of period (in shares)	11,636,694	7,322,933
Granted (in shares)	4,612,500	8,428,500
Exercised (in shares)	(615,447)	(180,301)
Cancelled (in shares)	(2,159,747)	(3,934,438)
Options outstanding at end of period (in shares)	13,474,000	11,636,694
2012 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock-Based Compensation Plans [Abstract]
Number of shares authorized (in shares)	8,817,993
Number of Common Stock shares available for future issuance (in shares)	3,960,493
Minimum percentage of fair market value considered as exercise price of non-qualified stock options (in hundredths)	100.00%
Minimum percentage of fair market value considered as exercise price of incentive stock options (in hundredths)		100.00%
Minimum percentage of voting power by recipient of incentive stock options (in hundredths)	10.00%
Minimum percentage of fair market value considered as exercise price for greater than 10% recipients of incentive stock options (in hundredths)	110.00%
Minimum percentage of fair market value considered as purchase price of the performance-vested stock (in hundredths)	100.00%
Vesting period	3 years
Maximum term of options issued	10 years
Number of options granted (in shares)	700,000
Weighted average grant date fair value of options granted in tender offer (in dollars per share)	$ 0.35
Shares Outstanding [Abstract]
Granted (in shares)	700,000
2012 Equity Incentive Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	33 months
Stock-Based Compensation Plans [Abstract]
Vesting period	33 months
2012 Equity Incentive Plan [Member] | Restricted Stock [Member]
Stock-Based Compensation Plans [Abstract]
Number of options granted (in shares)	4,157,500
Weighted average grant date fair value of options granted in tender offer (in dollars per share)	$ 0.21
Shares Outstanding [Abstract]
Granted (in shares)	4,157,500