CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Total revenues	$ 40,728	$ 78,148	$ 210,627	$ 232,319
Cost of revenues:
Total cost of revenues	25,352	44,273	120,256	122,338
Gross profit	15,376	33,875	90,371	109,981
Operating expenses:
Selling, general and administrative	6,237	5,610	19,493	16,872
Research and development	3,667	3,327	13,139	10,460
Bad debt expense (recovery)	14	(53)	658	554
Total operating expenses	9,918	8,884	33,290	27,886
Income from operations	5,458	24,991	57,081	82,095
Other income (expense):
Interest expense	(143)	(62)	(378)	(192)
Interest income	12	236	68	695
Foreign exchange gains (losses)	52	(235)	132	(903)
Other, net	(50)	11	(88)	(8)
Total other income (expense), net	(129)	(50)	(266)	(408)
Income before income taxes	5,329	24,941	56,815	81,687
Income tax expense	1,577	7,950	18,071	25,814
Net income	3,752	16,991	38,744	55,873
Basic earnings per share	$ 0.29	$ 1.32	$ 2.96	$ 4.34
Diluted earnings per share	$ 0.29	$ 1.31	$ 2.95	$ 4.32
Weighted average shares outstanding – Basic	12,951,845	12,911,316	12,949,807	12,873,677
Weighted average shares outstanding – Diluted	12,999,807	12,982,322	13,000,103	12,943,105
Products
Revenues:
Total revenues	33,437	76,749	190,167	221,519
Cost of revenues:
Total cost of revenues	21,902	41,988	110,540	116,141
Rental equipment
Revenues:
Total revenues	7,291	1,399	20,460	10,800
Cost of revenues:
Total cost of revenues	$ 3,450	$ 2,285	$ 9,716	$ 6,197