Restructuring and Severance	12 Months Ended
Dec. 31, 2020
Restructuring And Related Activities [Abstract]
Restructuring and Severance	15. Restructuring and Severance During the year ended December 31, 2019, the Company incurred restructuring and severance related costs of $105,000. These costs were partially offset by the reversal of a restructuring accrual of $91,000 for future rental payment obligations associated with vacated office space at its Fremont, California facility, which was sublet in the third quarter of 2019. In the year ended December 31, 2020, the Company incurred restructuring expenses of $1,716,000, consisting of severance related costs of $375,000, and facility rental related costs associated with office space of an acquired business of approximately $1,341,000. The latter included a charge of $1,199,000 associated with the impairment of the ROU operating lease asset, which was subleased, but subsequently went into default due to non-payment of rent beginning April 1, 2020. Sublease income of $198,000 was received in the first quarter of 2020, however, since the first quarter of 2020, no rental payments were received.

Restructuring and Severance

12 Months Ended

Dec. 31, 2020

Restructuring And Related Activities [Abstract]

15. Restructuring and Severance

During the year ended December 31, 2019, the Company incurred restructuring and severance related costs of $105,000. These costs were partially offset by the reversal of a restructuring accrual of $91,000 for future rental payment obligations associated with vacated office space at its Fremont, California facility, which was sublet in the third quarter of 2019.

In the year ended December 31, 2020, the Company incurred restructuring expenses of $1,716,000, consisting of severance related costs of $375,000, and facility rental related costs associated with office space of an acquired business of approximately $1,341,000. The latter included a charge of $1,199,000 associated with the impairment of the ROU operating lease asset, which was subleased, but subsequently went into default due to non-payment of rent beginning April 1, 2020. Sublease income of $198,000 was received in the first quarter of 2020, however, since the first quarter of 2020, no rental payments were received.