Stockholder's Equity | Stockholder's Equity (a) Stock Equity and Incentive Plan The Company recognizes stock-based compensation in accordance with the provisions of ASC Topic 718, Compensation-Stock Compensation . Stock-based compensation expense was $701 and $1,033, excluding $4 and $22 of compensation charges related to our Amended and Restated 1996 Employee Stock Purchase Plan, or the ESPP, for the three months ended June 30, 2022 and 2021, respectively, and $1,560 and $1,957, excluding $26 and $30 of compensation charges related to ESPP, for the six months ended June 30, 2022 and 2021, respectively. As of June 30, 2022, there was $3,286 of total unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted-average period of 2.79 years. As of June 30, 2022, there was $3,499 of total unrecognized compensation expense related to restricted stock awards, which is expected to be recognized over a weighted-average period of 2.85 years. Stock Options During the three months ended June 30, 2022, the Company issued 18 shares of common stock upon the exercise of stock options and received $149 as payment for the exercise price. No shares were surrendered to the Company to satisfy minimum tax withholding obligations. Additionally, during the three months ended June 30, 2022, 398 stock options were granted and 159 stock options expired, were canceled or were forfeited. During the six months ended June 30, 2022, upon the net exercise of 248 stock options, the Company issued 41 shares of common stock and received $149 as payment for the exercise price, 14 shares were surrendered to the Company to satisfy minimum tax withholding obligations, and 193 shares were cancelled. Additionally, during the six months ended June 30, 2022, 398 stock options were granted and 329 stock options expired, were canceled or were forfeited. During the six months ended June 30, 2021, 496 stock options were granted. The Company has estimated the fair value of each option grant on the date of grant using the Black-Scholes option-pricing model. The weighted average assumptions utilized to determine the fair value of options granted during the six months ended June 30, 2022 are as follows: Six Months Ended June 30, 2022 2021 Risk-free interest rate 2.97 % 0.92 % Expected volatility 43.16 % 44.98 % Expected life (in years) 4.24 4.28 Dividend yield 0 % 0 % During the six months ended June 30, 2022, there were accelerated vesting and extended exercise term modifications of stock options as it related to the retirement of Mr. Kits van Heyningen, which resulted in a reduction of approximately $85 in compensation cost. During the three and six months ended June 30, 2022, there were accelerated vesting term modifications of stock options for employees terminated as part of the Company's restructuring, which resulted in a reduction of approximately $81 in compensation cost. During the three months ended June 30, 2022, there were accelerated vesting term modifications of stock options for executive employment agreements, which resulted in an acceleration of compensation expense of approximately $48. As of June 30, 2022, there were 1,948 options outstanding with a weighted average exercise price of $9.83 per share and 858 options exercisable with a weighted average exercise price of $10.39 per share. Restricted Stock During the three months ended June 30, 2022, 183 shares of restricted stock were granted with a weighted average grant date fair value of $8.29 per share and 26 shares of restricted stock were forfeited. Additionally, during the three months ended June 30, 2022, 79 shares of restricted stock vested, of which no shares of common stock were surrendered to the Company as payment by employees in lieu of cash to satisfy minimum tax withholding obligations in connection with the vesting of restricted stock. During the six months ended June 30, 2022, 183 shares of restricted stock were granted with a weighted average grant date fair value of $8.29 per share and 86 shares of restricted stock were forfeited. Additionally, during the six months ended June 30, 2022, 147 shares of restricted stock vested, of which no shares of common stock were surrendered to the Company as payment by employees in lieu of cash to satisfy minimum tax withholding obligations in connection with the vesting of restricted stock. As of June 30, 2022, there were 440 shares of restricted stock outstanding that were still subject to service-based vesting conditions. During the six months ended June 30, 2022, there were accelerated vesting term modifications of restricted stock as it related to the retirement of Mr. Kits van Heyningen, which resulted in an acceleration in compensation expense of approximately $186. During the three and six months ended June 30, 2022, there were accelerated vesting term modifications of restricted stock for employees terminated as part of the Company's restructuring, which resulted in an acceleration in compensation expense of approximately $57 for the three months ended June 30, 2022 and approximately $125 for the six months ended June 30, 2022. During the three months ended June 30, 2022, there were accelerated vesting term modifications of restricted stock for executive employment agreements, which resulted in an acceleration in compensation expense of approximately $66. As of June 30, 2022, the Company had no unvested outstanding options and no outstanding shares of restricted stock that were subject to performance-based or market-based vesting conditions. (b) Employee Stock Purchase Plan The Company's ESPP affords eligible employees the right to purchase common stock, via payroll deductions, through various offering periods at a purchase price equal to 85% of the fair market value of the common stock on the first or last day of the offering period, whichever is lower. During the three and six months ended June 30, 2022, 0 and 22 shares were issued under the ESPP plan, respectively. During the three and six months ended June 30, 2021, no shares were issued under the ESPP plan. The Company recorded compensation charges related to the ESPP of $4 and $22 for the three months ended June 30, 2022 and 2021, respectively, and $26 and $30 for the six months ended June 30, 2022 and 2021, respectively. (c) Stock-Based Compensation Expense The following table presents stock-based compensation expense, including under the ESPP, in the Company's consolidated statements of operations for the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Cost of product sales $ 61 $ 70 $ 135 $ 116 Cost of service sales 3 3 5 5 Research and development 190 185 331 341 Sales, marketing and support 25 235 211 425 General and administrative 426 562 904 1,100 $ 705 $ 1,055 $ 1,586 $ 1,987 (d) Accumulated Other Comprehensive Loss (AOCL) Comprehensive loss includes net loss and unrealized gains and losses from foreign currency translation. The components of the Company’s comprehensive loss and the effect on earnings for the periods presented are detailed in the accompanying consolidated statements of comprehensive loss. The balances for the three months ended June 30, 2022 and 2021 are as follows: Foreign Currency Translation Total Accumulated Other Comprehensive Loss Balance, March 31, 2022 $ (3,602) $ (3,602) Other comprehensive loss (419) (419) Net other comprehensive loss (419) (419) Balance, June 30, 2022 $ (4,021) $ (4,021) Foreign Currency Translation Total Accumulated Other Comprehensive Loss Balance, March 31, 2021 $ (3,009) $ (3,009) Other comprehensive income 41 41 Net other comprehensive income 41 41 Balance, June 30, 2021 $ (2,968) $ (2,968) The balances for the six months ended June 30, 2022 and 2021 are as follows: Foreign Currency Translation Total Accumulated Other Comprehensive Loss Balance, December 31, 2021 $ (3,409) $ (3,409) Other comprehensive loss (612) (612) Net other comprehensive loss (612) (612) Balance, June 30, 2022 $ (4,021) $ (4,021) Foreign Currency Translation Total Accumulated Other Comprehensive Loss Balance, December 31, 2020 $ (3,232) $ (3,232) Other comprehensive income 264 264 Net other comprehensive income 264 264 Balance, June 30, 2021 $ (2,968) $ (2,968) |