Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
ASSETS
Cash and cash equivalents	$ 14,540	$ 23,319
Short-term marketable securities	5,976	4,265
Restricted cash	286	282
Accounts receivable, net	6,270	5,442
Inventories, net	6,422	5,949
Prepaid expenses and other	1,464	860
Total current assets	34,958	40,117
Long-term marketable securities	2,297	3,805
Long-term restricted cash	1,202	395
Deferred tax assets, net	10,694	11,095
Property and equipment, net	1,836	1,930
Goodwill	23,908	2,472
Intangible assets, net	13,431	943
Operating lease right of use asset	5,048	5,285
Other assets	193	125
Total assets	93,567	66,167
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	2,708	1,370
Accrued liabilities	13,305	7,880
Notes payable	304	300
Operating lease liabilities, current portion	877	771
Total current liabilities	17,194	10,321
Notes payable, less current portion	0	18
Other liabilities, noncurrent	5,420	293
Operating lease liabilities, noncurrent	5,952	6,395
Total liabilities	28,566	17,027
Stockholders' equity:
Preferred stock, $0.00001 par value; 5,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.00001 par value; 100,000,000 shares authorized; 36,142,093 and 33,561,544 shares issued and outstanding, respectively	0	0
Additional paid-in capital	106,602	91,248
Accumulated deficit	(41,925)	(41,858)
Accumulated other comprehensive income (loss)	324	(250)
Total stockholders' equity	65,001	49,140
Total liabilities and stockholders' equity	$ 93,567	$ 66,167