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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Schedule of Stock Option Activity

The following is a summary of stock option activity: 

			Number of shares						Weighted average exercise price
Options outstanding as of December 31, 2019:			533,484						$	2.87
Granted			234,000						2.00
Exercised			(25,563)						2.74
Canceled and forfeited			(4,896)						3.98
Expired			(17,958)						5.16
Options outstanding as of December 31, 2020:			719,067						$	2.53

Schedue of Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about options outstanding as of December 31, 2020:

						Options Outstanding																		Options Exercisable
Range of exercise prices						Number outstanding as of December 31, 2020						Weighted average remaining contractual life						Weighted average exercise price						Number exercisable as of December 31, 2020						Weighted average exercise price
$2.00 - $2.00						237,500						5.79						$	2.00					3,500						$	2.00
2.46 - 2.46						350,000						1.01						2.46						350,000						2.46
2.79- 6.05						131,567						2.59						3.67						105,150						3.54
$2.00 - $6.05						719,067						2.88						$	2.53					458,650						$	2.70

Schedule of Stock Options Outstanding, Vested and Expected to Vest

Options outstanding that have vested and are expected to vest as of December 31, 2020 are as follows:

			Number of shares						Weighted average exercise price						Weighted average remaining contractual term						Aggregate intrinsic value
Vested			458,650						$	2.70					1.30						$	131
Expected to vest			244,024						2.22						5.64						180
Total			702,674						$	2.54					2.81						$	311

Schedule of Restricted Stock Units Activity

The following is a summary of restricted stock activity:

			Number of shares						Weighted average grant date fair value
Unvested at December 31, 2019:			3,112,426						$	4.06
Granted			2,137,817						3.42
Vested			(1,834,406)						3.93
Canceled			(239,232)						4.28
Unvested at December 31, 2020:			3,176,605						$	3.68
Expected to vest after December 31, 2020			2,947,031						$	3.68

Stock-Based Compensation, Valuation Assumptions

The fair value of stock-based compensation was determined using the Black-Scholes option pricing model and the following weighted average assumptions:

			Year Ended December 31,
			2020						2019
Stock Option Plans:
Risk free interest rate			2.00		%				2.47		%
Expected dividend yield			0		%				0		%
Expected term (in years)			3.75						5.00
Volatility			64		%				66		%
Employee Stock Purchase Plan:
Risk free interest rate			0.79		%				2.05		%
Expected dividend yield			0		%				0		%
Expected term (in years)			1.05						1.05
Volatility			65		%				65		%

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