Stock Option	12 Months Ended
Dec. 31, 2022
Share-based Payment Arrangement [Abstract]
Stock Option	13. Stock Option In 2015, Harbor issued a stock option (the 2015 Stock Option) to purchase 558,835 shares of its common stock at an exercise price of $0.21386 per share. The value of the 2015 Stock Option at the date of grant was deemed to be $0.07 per share based on a life of 7.0 years, a risk-free interest rate of 2.01% and expected volatility of 157.1%. The 2015 Stock Option was the only stock option outstanding as of December 31, 2021. In March 2022, the Company and the holder of the 2015 Stock Option entered into an agreement pursuant to which the 2015 Stock Option was cancelled and terminated in exchange for a cash payment by the Company of approximately $969.

Stock Option

12 Months Ended

Dec. 31, 2022

Share-based Payment Arrangement [Abstract]

13. Stock Option

In 2015, Harbor issued a stock option (the 2015 Stock Option) to purchase 558,835 shares of its common stock at an exercise price of $0.21386 per share. The value of the 2015 Stock Option at the date of grant was deemed to be $0.07 per share based on a life of 7.0 years, a risk-free interest rate of 2.01% and expected volatility of 157.1%. The 2015 Stock Option was the only stock option outstanding as of December 31, 2021. In March 2022, the Company and the holder of the 2015 Stock Option entered into an agreement pursuant to which the 2015 Stock Option was cancelled and terminated in exchange for a cash payment by the Company of approximately $969.