Sale of Investment in Software Company	12 Months Ended
Dec. 31, 2020
Investment in Software Company [Abstract]
Investment in Software Company	Sale of Investment in Software CompanyDuring 2018, Canon Inc. ("Canon") acquired all of the outstanding shares of BriefCam, Ltd. ("BriefCam"), a privately-held Israeli company, and the Company received $9.7 million from the closing proceeds for its convertible preferred shares of BriefCam, as well as received $100,000 following the satisfaction of a contingency, resulting in a gain on sale of $6.6 million during the year ended December 31,2018. Additionally, during the year ended December 31, 2019, the Company recognized a gain of $41,000 related to the release of cash from escrow in connection with the sale.

Sale of Investment in Software Company

12 Months Ended

Dec. 31, 2020

Investment in Software Company [Abstract]

Sale of Investment in Software CompanyDuring 2018, Canon Inc. ("Canon") acquired all of the outstanding shares of BriefCam, Ltd. ("BriefCam"), a privately-held Israeli company, and the Company received $9.7 million from the closing proceeds for its convertible preferred shares of BriefCam, as well as received $100,000 following the satisfaction of a contingency, resulting in a gain on sale of $6.6 million during the year ended December 31,2018. Additionally, during the year ended December 31, 2019, the Company recognized a gain of $41,000 related to the release of cash from escrow in connection with the sale.