Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Current assets:
Cash and cash equivalents	$ 52,391	$ 78,222
Marketable securities	4,757	32,015
Accounts receivable, net	39,789	28,855
Inventories	39,670	30,238
Receivable from sale of business	0	1,998
Other	3,694	3,032
Total current assets	140,301	174,360
Marketable securities, long-term	2,489	4,753
Property, equipment and improvements, net	12,145	12,801
Identifiable intangible assets, net	44,301	11,800
Goodwill	155,982	131,995
Deferred tax assets	3,576	9,211
Other	542	269
Total assets	359,336	345,189
Current liabilities:
Accounts payable	11,024	6,240
Accrued compensation	6,121	4,325
Accrued warranty	1,348	987
Accrued professional fees	896	928
Accrued restructuring	636	1,656
Unearned revenue	4,339	1,343
Contingent consideration on acquired businesses	3,759	388
Other	2,858	2,113
Total current liabilities	30,981	17,980
Income taxes payable	692	877
Deferred tax liabilities	455	534
Contingent consideration on acquired businesses	4,504	6,000
Other non-current liabilities	676	654
Total liabilities	37,308	26,045
Contingencies (see Note 12)
Stockholders' equity:
Preferred stock, $.01 par value; 2,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $.01 par value; 60,000,000 shares authorized; 33,581,353 and 33,007,993 shares issued	336	330
Additional paid-in capital	251,366	245,528
Retained earnings	145,519	150,478
Accumulated other comprehensive loss	(20,610)	(22,659)
Treasury stock, at cost, 6,430,128 and 6,436,578 shares	(54,583)	(54,533)
Total stockholders' equity	322,028	319,144
Total liabilities and stockholders' equity	$ 359,336	$ 345,189