Balance Sheet Components (Schedule of Inventory) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Balance Sheet Components [Abstract]
Raw materials	$ 2,208	$ 1,785
Finished products	10,369	10,599
Inventory, gross	12,577	12,384
Less: Reserve for excess and obsolete	(617)	(2,395)
Inventories	$ 11,960	$ 9,989

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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