Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 29,394	$ 26,316
Marketable investments	13,046	7,605
Accounts receivable, net of allowance for credit losses of $1,505 and $1,354, respectively	17,597	21,556
Inventories	29,333	33,921
Other current assets and prepaid expenses	6,892	5,648
Total current assets	96,262	95,046
Property and equipment, net	2,391	2,817
Deferred tax asset	500	423
Operating lease right-of-use assets	17,645	7,702
Goodwill	1,339	1,339
Other long-term assets	5,290	6,411
Total assets	123,427	113,738
Current liabilities:
Accounts payable	6,799	12,685
Accrued liabilities	25,644	30,307
Operating lease liabilities	1,608	2,800
Extended warranty liability	1,497	1,999
Deferred revenue	9,580	10,831
Total current liabilities	45,128	58,622
Deferred revenue, net of current portion	2,244	3,391
Income tax liability	93	93
Long-term debt	7,167	0
Operating lease liabilities, net of current portion	16,497	5,112
Other long-term liabilities	292	578
Total liabilities	71,421	67,796
Commitments and Contingencies (Notes 11 and 12)
Stockholders’ equity:
Common stock, $0.001 par value; authorized: 50,000,000 shares; issued and outstanding: 17,625,849 and 14,315,586 shares at September 30, 2020 and December 31, 2019, respectively	18	14
Additional paid-in capital	114,410	82,346
Accumulated deficit	(62,423)	(36,358)
Accumulated other comprehensive income (loss)	1	(60)
Total stockholders’ equity	52,006	45,942
Total liabilities and stockholders’ equity	$ 123,427	$ 113,738