Stockholders' Equity and Employee Stock Option Plans (Details Textual)			12 Months Ended
	Apr. 22, 2016 right $ / shares shares	Dec. 07, 2015	Dec. 31, 2016 $ / shares shares	Oct. 31, 2016 shares	Dec. 31, 2015 $ / shares shares	Dec. 31, 2014 shares	Dec. 31, 2013 shares	Apr. 01, 2013 shares	Mar. 31, 2013 shares
Class of Stock [Line Items]
Class Of Warrant Or Right, Exclusion Of Beneficial Owners, Beneficial Ownership Percentage	4.99%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				500,000
Number of shares outstanding			505,872		285,536	259,679	410,484		550,540
Common Stock, Capital Shares Reserved for Future Issuance								1,090,540	2,097,283
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			602,825		517,505	515,217	457,585		1,546,743
Preferred Stock, Shares Authorized			5,000,000		5,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.01		$ 0.01		$ 0.01
Common Stock, Shares Authorized			10,000,000		10,000,000
Common Stock, Par or Stated Value Per Share | $ / shares			$ 0.01		$ 0.01
Common Stock, Shares, Outstanding			4,431,736		4,416,452
Common Stock, Dividend, Rights Issued | right	1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right	0.0010
Common Stock [Member]
Class of Stock [Line Items]
Reverse stock split ratio		0.1
2016 Equity Incentive Plan [Member]
Class of Stock [Line Items]
Number of shares outstanding			687,036
Common Stock, Capital Shares Reserved for Future Issuance			1,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			502,825
1997 Stock Plan [Member]
Class of Stock [Line Items]
Award vesting period (in years)			4 years
2016 Inducement Equity Incentive Plan [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			250,000
Number of shares outstanding			150,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			100,000
Granted After March 31, 2013 [Member] | 2016 Equity Incentive Plan [Member] | Stock Options [Member]
Class of Stock [Line Items]
Award expiration term (in years)			10 years
Minimum [Member]
Class of Stock [Line Items]
Award vesting period (in years)			2 years
Minimum [Member] | 1997 Stock Plan [Member]
Class of Stock [Line Items]
Exercise price | $ / shares			$ 0
Maximum [Member]
Class of Stock [Line Items]
Award vesting period (in years)			3 years
Maximum [Member] | 1997 Stock Plan [Member]
Class of Stock [Line Items]
Exercise price | $ / shares			$ 1