In December 2020, we completed an underwritten public offering of 2,990,000 shares of our common stock at a public offering price of $7.25. We realized gross proceeds of approximately $21,700 before deducting underwriting discounts and estimated offering expenses.

In April 2018, we filed a universal shelf registration statement on Form S-3 with the Securities and Exchange Commission (“SEC”) to provide access to additional capital, if needed. Pursuant to the shelf registration statement, we may from time to time offer to sell in one or more offerings shares of our common stock or other securities having an aggregate value of up to $175,000 (which includes approximately $60,000 of unsold securities that were previously registered on other registration statements effective at the time of this filing of our current S-3). The shelf registration statement relating to these securities became effective on April 16, 2018. As of December 31, 2020, there is approximately $111,760 remaining available under the shelf registration statement.

On March 10, 2020, our Board of Directors authorized a new stock repurchase plan, under which we may repurchase up to $5,000 of our outstanding common stock. This new stock repurchase program is in addition to the approximately 364,446 shares available under our existing stock repurchase plan.

Under this new stock repurchase program, we may repurchase shares in accordance with all applicable securities laws and regulations, including Rule 10b-18 of the Securities Exchange Act of 1934, as amended. The extent to which we repurchase our shares, and the timing of such repurchases, will depend upon a variety of factors, including market conditions, regulatory requirements and other corporate considerations, as determined by our management. The repurchase program may be extended, suspended or discontinued at any time. We expect to finance the program from existing cash resources.

We have one active equity plan, the 2018 Incentive Award Plan (the “2018 Plan”). The 2018 Plan, approved by our shareholders, is intended to replace our 2009 Equity Incentive Plan, as amended (the “2009 Plan”), however, the terms and conditions of the 2009 Plan will continue to govern any outstanding awards granted thereunder.

Employees and consultants of the Company, its subsidiaries and affiliates, as well as members of our board, are eligible to receive awards under the 2018 Plan. The 2018 Plan provides for the grant of stock options, including incentive stock options (“ISOs”) and nonqualified stock options (“NQSOs”), stock appreciation rights, restricted stock, restricted stock units ("RSUs"), performance bonus awards, performance stock unit awards, other stock or cash-based awards and dividend equivalents to eligible individuals. We generally grant stock options with exercise prices equal to the fair market value at the time of

The number of shares available for issuance under the 2018 Plan is equal to the sum of (i) 750,000 shares, (ii) any shares subject to issued and outstanding awards under the 2009 Plan as of the effective date of the 2018 Plan that expire, are cancelled or otherwise terminate following the effective date of the 2018 Plan. In May 2019 and May 2020, our shareholders approved amendments to the 2018 Plan to increase the number of shares of common stock authorized for issuance by 600,000 shares and 1,000,000 shares, respectively. We have 1,713,000 options and RSUs granted and outstanding pursuant to the 2018 Plan as of December 31, 2020.

In December 2019, we offered to exchange certain outstanding options to purchase shares of our common stock previously granted under the 2009 Plan and the 2018 Plan that have an exercise price per share higher than the greater of $8.50 or the closing trading price of our common stock on the offer expiration date (“eligible options”) for new RSUs to be granted under the 2018 Plan. The offer exchange program was approved by our board of directors and by our shareholders earlier in 2019. Under the offer exchange program, every 2.5 shares underlying an eligible option would be exchanged for one new RSU. Upon expiration of the exchange offer in January 2020, we granted 187,000 RSUs in exchange for the cancellation of options to purchase 467,500 shares that were tendered by employees who participated in the offer exchange program.

We use the Black-Scholes option valuation model to value employee stock awards. We estimate stock price volatility based upon our historical volatility. Estimated option life and forfeiture rate assumptions are derived from historical data. For stock-based compensation awards with graded vesting, we recognize compensation expense using the straight-line amortization method.

Total compensation expense recognized in the Consolidated Statements of Comprehensive Loss for stock based awards was $2,365 and $2,268 for 2020 and 2019, respectively.


	2020			2019
Grant date fair value	$	2.44		$	2.65
Risk-free interest rate	0.20		%	1.25		%
Expected volatility	55		%	44		%
Expected life in years	2.85			3.50
Dividend yield	—			—


	Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at the beginning of the year	1,685,000	$	9.71
Granted	771,000	6.52
Exercised	(130,000)	5.55
Canceled	(1,054,000)	10.06
Outstanding at the end of the year	1,272,000	$	7.92	3.4	$	533
Vested and expected to vest	1,256,000	$	8.55	3.2	$	456
Exercisable	375,000	$	7.91	2.1	$	98

The total intrinsic value of options exercised during the years ended December 31, 2020 and 2019 was $205 and $356, respectively. As of December 31, 2020, total compensation cost not yet recognized related to nonvested share options was $2,563, which is expected to be recognized over a weighted average period of 1.75 years.


	Shares	Weighted Average Grant-Date Fair Value
Outstanding at the beginning of the year	70,000	$	11.52
Granted	597,000	5.32
Released	(76,000)	6.86
Forfeited	(150,000)	5.47
Outstanding at the end of the year	441,000	$	5.99

The total fair value of RSUs vested during the years ended December 31, 2020 and 2019 was $528 and $430, respectively. As of December 31, 2020, total compensation cost not yet recognized related to nonvested share options was $2,238, which is expected to be recognized over a weighted average period of 2.32 years.