Stock-based Compensation	6 Months Ended
Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation	12. Stock-based Compensation On June 30, 2020, the Company issued options to purchase 280,000 shares of the Company’s common stock, to certain executive officers and other employees. The right to exercise the options will vest over a five-year period on a straight-line basis. The options have a strike price of $3.81 per share and expire on June 30, 2030. The estimated value of these options is $290,000, which is being expensed ratably over the vesting period. In 2015, 2016, and 2018, the Company issued 390,352, 111,281, and 70,000, respectively, of restricted stock units (“RSUs”) to various employees to be settled in shares of common stock, which were valued at $4.1 million, $909,000, and $404,000, respectively, on the dates of grant. The Company recorded $108,000 and $475,000 of compensation expense related to the RSUs for the six months ended June 30, 2021 and 2020, respectively. There were 41,941 unvested RSUs as of June 30, 2021, which will generate an estimated future expense of $150,000. The Company recorded $25,000 of compensation expense for the six months ended June 30, 2021 related to the stock options granted on June 30, 2020. There were 209,000 unvested options as of June 30, 2021, which will generate an estimated future expense of $219,000.

Stock-based Compensation

6 Months Ended

Jun. 30, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

12. Stock-based Compensation

On June 30, 2020, the Company issued options to purchase 280,000 shares of the Company’s common stock, to certain executive officers and other employees. The right to exercise the options will vest over a five-year period on a straight-line basis. The options have a strike price of $3.81 per share and expire on June 30, 2030. The estimated value of these options is $290,000, which is being expensed ratably over the vesting period.

In 2015, 2016, and 2018, the Company issued 390,352, 111,281, and 70,000, respectively, of restricted stock units (“RSUs”) to various employees to be settled in shares of common stock, which were valued at $4.1 million, $909,000, and $404,000, respectively, on the dates of grant.

The Company recorded $108,000 and $475,000 of compensation expense related to the RSUs for the six months ended June 30, 2021 and 2020, respectively. There were 41,941 unvested RSUs as of June 30, 2021, which will generate an estimated future expense of $150,000.

The Company recorded $25,000 of compensation expense for the six months ended June 30, 2021 related to the stock options granted on June 30, 2020. There were 209,000 unvested options as of June 30, 2021, which will generate an estimated future expense of $219,000.