Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Current assets:
Cash and cash equivalents	$ 45,610	$ 78,222
Marketable securities	28,204	32,015
Accounts receivable, net	30,292	28,855
Inventories	31,119	30,238
Receivable from sale of business	0	1,998
Other	4,823	3,032
Total current assets	140,048	174,360
Marketable securities, long-term	4,247	4,753
Property, equipment and improvements, net	12,723	12,801
Identifiable intangible assets, net	34,469	11,800
Goodwill	149,333	131,995
Deferred tax assets	6,237	9,211
Other	451	269
Total assets	347,508	345,189
Current liabilities:
Accounts payable	6,330	6,240
Accrued compensation	4,555	4,325
Accrued warranty	1,164	987
Accrued professional fees	793	928
Accrued restructuring	1,631	1,656
Unearned revenue	4,135	1,343
Contingent consideration on acquired businesses	2,411	388
Other	2,451	2,113
Total current liabilities	23,470	17,980
Income taxes payable	685	877
Deferred tax liabilities	486	534
Contingent consideration on acquired businesses	3,570	6,000
Other non-current liabilities	681	654
Total liabilities	28,892	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; 33,480,707 and 33,007,993 shares issued	335	330
Additional paid-in capital	249,591	245,528
Retained earnings	145,876	150,478
Accumulated other comprehensive loss	(22,406)	(22,659)
Treasury stock, at cost, 6,455,136 and 6,436,578 shares	(54,780)	(54,533)
Total stockholders' equity	318,616	319,144
Total liabilities and stockholders' equity	$ 347,508	$ 345,189