Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Dec. 31, 2019	Sep. 30, 2019
ASSETS
Cash and cash equivalents	$ 17,092,203	$ 18,819,078
Short-term marketable securities	4,181,909	3,695,364
Restricted cash	269,830	263,136
Accounts receivable, net	5,936,915	3,644,059
Inventories, net	6,061,746	5,835,163
Prepaid expenses and other	1,022,816	1,781,837
Total current assets	34,565,419	34,038,637
Long-term marketable securities	945,833	1,384,819
Long-term restricted cash	395,254	434,704
Deferred tax assets, net	5,214,610	5,387,000
Property and equipment, net	2,222,248	2,269,506
Goodwill	2,364,401	2,305,750
Intangible assets, net	1,129,282	1,175,634
Operating lease right of use asset	5,685,985
Other assets	124,364	123,933
Total assets	52,647,396	47,119,983
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	1,468,475	859,530
Accrued liabilities	6,328,218	8,134,341
Notes payable, current portion	286,700	279,588
Operating lease liabilities, current portion	715,864
Total current liabilities	8,799,257	9,273,459
Notes payable, less current portion	33,740	32,903
Other liabilities, noncurrent	490,794	2,432,272
Operating lease liabilities, noncurrent	6,934,074
Total liabilities	16,257,865	11,738,634
Stockholders' equity:
Preferred stock, $0.00001 par value; 5,000,000 shares authorized; none issued and outstanding
Common stock, $0.00001 par value; 50,000,000 shares authorized; 33,033,330 and 32,949,987 shares issued and outstanding, respectively	331	330
Additional paid-in capital	89,874,181	89,571,641
Accumulated deficit	(53,111,576)	(53,731,903)
Accumulated other comprehensive loss	(373,405)	(458,719)
Total stockholders' equity	36,389,531	35,381,349
Total liabilities and stockholders' equity	$ 52,647,396	$ 47,119,983