Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Balance Sheet Components - Summary of Balance Sheet Amounts (Details)

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Note 3 - Balance Sheet Components - Summary of Balance Sheet Amounts (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Cash $ 12,080 $ 17,281
Cash equivalents 58,583 66,562
Cash and cash equivalents 70,663 83,843
Restricted cash 69 522
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance 70,732 84,365
Inventories:    
Finished goods 4,304 4,476
Raw materials 769 873
Reserve for obsolescence (84) (92)
Inventory, Net, Total 4,989 5,257
Other accrued expenses:    
Sales returns 89 137
Employee-related expense 728 988
Warehousing, inventory-related and other 504 808
Accrued Liabilities, Current, Total 1,321 1,933
Deferred revenue:    
Deferred revenue 5,254 8,536
Unshipped Product [Member]    
Deferred revenue:    
Deferred revenue 3,400 6,525
Auto ship advances [Member]    
Deferred revenue:    
Deferred revenue 1,771 1,901
Product and Service, Other [Member]    
Deferred revenue:    
Deferred revenue $ 83 $ 110