Stockholders' Equity (Details 1) - Stock option plans [Member]	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Number of Shares, Non-vested stock options as of January 1, 2019 | shares	334,000
Non-vested stock options as of December 31, 2019 | shares	321,000
Number of Shares, Stock options granted during the year ended December 31, 2019 | shares	51,000
Number of Shares, Stock options that vested during the year ended December 31, 2019 | shares	36,000
Number of Shares, Stock options that were forfeited during the year ended December 31, 2019 | shares	29,000
Weighted Average Fair Value at Grant Date, Non-vested stock options as of January 1, 2019	$ 3.63
Weighted Average Fair Value at Grant Date, Non-vested stock options as of December 31, 2019	3.49
Weighted Average Fair Value at Grant Date, Stock options granted during the year ended December 31, 2019	2.93
Weighted Average Fair Value at Grant Date, Stock options that vested during the year ended December 31, 2019	4.10
Weighted Average Fair Value at Grant Date, Stock options that were forfeited during the year ended December 31, 2019	3.39
Weighted Average Exercise Price, Non-vested stock options as of January 1, 2019	6.64
Weighted Average Exercise Price, Non-vested stock options as of December 31, 2019	6.55
Weighted Average Exercise Price, Stock options granted during the year ended December 31, 2019	5.90
Weighted Average Exercise Price, Stock options that vested during the year ended December 31, 2019	6.87
Weighted Average Exercise Price, Stock options that were forfeited during the year ended December 31, 2019	$ 6.05