Stock Incentive Plans - Schedule of Summary of Additional Information On Stock Options Outstanding (Details)	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Number of Options Outstanding, Shares | shares	233,400
Options Outstanding Weighted-average Remaining Contractual Life (years)	4 years 6 months 10 days
Options Outstanding Weighted Average Exercise Price	$ 26.86
Number of Option Exercisable, Shares | shares	193,100
Options Exercisable Weighted Average Exercise Price	$ 32.10
Range One [Member]
Range of Exercise Prices, Upper	$ 0.10
Number of Options Outstanding, Shares | shares	14,000
Options Outstanding Weighted-average Remaining Contractual Life (years)	4 years 3 months 19 days
Options Outstanding Weighted Average Exercise Price	$ 1.00
Number of Option Exercisable, Shares | shares	14,000
Options Exercisable Weighted Average Exercise Price	$ 1.00
Range Two [Member]
Range of Exercise Prices, Lower	0.17
Range of Exercise Prices, Upper	$ 0.18
Number of Options Outstanding, Shares | shares	64,600
Options Outstanding Weighted-average Remaining Contractual Life (years)	4 years 1 month 16 days
Options Outstanding Weighted Average Exercise Price	$ 1.72
Number of Option Exercisable, Shares | shares	24,300
Options Exercisable Weighted Average Exercise Price	$ 1.70
Range Three [Member]
Range of Exercise Prices, Lower	0.26
Range of Exercise Prices, Upper	$ 0.82
Number of Options Outstanding, Shares | shares	48,400
Options Outstanding Weighted-average Remaining Contractual Life (years)	2 years 8 months 23 days
Options Outstanding Weighted Average Exercise Price	$ 4.62
Number of Option Exercisable, Shares | shares	48,400
Options Exercisable Weighted Average Exercise Price	$ 4.62
Range Four [Member]
Range of Exercise Prices, Lower	1.07
Range of Exercise Prices, Upper	$ 2.20
Number of Options Outstanding, Shares | shares	102,150
Options Outstanding Weighted-average Remaining Contractual Life (years)	5 years 8 months 26 days
Options Outstanding Weighted Average Exercise Price	$ 10.73
Number of Option Exercisable, Shares | shares	102,150
Options Exercisable Weighted Average Exercise Price	$ 10.73
Range Five [Member]
Range of Exercise Prices, Lower	47.60
Range of Exercise Prices, Upper	$ 87.60
Number of Options Outstanding, Shares | shares	2,100
Options Outstanding Weighted-average Remaining Contractual Life (years)	8 months 9 days
Options Outstanding Weighted Average Exercise Price	$ 676.00
Number of Option Exercisable, Shares | shares	2,100
Options Exercisable Weighted Average Exercise Price	$ 676.00
Range Six [Member]
Range of Exercise Prices, Lower	127.60
Range of Exercise Prices, Upper	$ 207.60
Number of Options Outstanding, Shares | shares	2,150
Options Outstanding Weighted-average Remaining Contractual Life (years)	8 months 9 days
Options Outstanding Weighted Average Exercise Price	$ 1,582.98
Number of Option Exercisable, Shares | shares	2,150
Options Exercisable Weighted Average Exercise Price	$ 1,582.98