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Income Statements (USD $)
In Thousands, except Per Share data
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Revenue:    
Sales, net$ 4,807$ 3,695$ 10,586$ 6,936
Rental income12,67210,32635,15330,103
Service and maintenance income222224774656
Total revenue17,70114,24546,51337,695
Operating costs and expenses:    
Cost of sales, exclusive of depreciation stated separately below3,2312,2016,4174,329
Cost of rentals, exclusive of depreciation stated separately below5,6224,18814,89311,784
Cost of service and maintenance, exclusive of depreciation stated separately below92144323450
Selling, general, and administrative expense1,5681,3594,4174,379
Depreciation and amortization3,5452,99010,2708,770
Total operating costs and expenses14,05810,88236,32029,712
Operating income3,6433,36310,1937,983
Other income (expense):    
Interest expense(11)(40)(48)(168)
Other income (expense)(34)5371996
Total other income (expense)(45)13671(72)
Income before provision for income taxes3,5983,37610,8647,911
Provision for income taxes1,3671,2234,1282,852
Net income$ 2,231$ 2,153$ 6,736$ 5,059
Earnings per share:    
Basic$ 0.18$ 0.18$ 0.55$ 0.42
Diluted$ 0.18$ 0.18$ 0.55$ 0.41
Weighted average shares outstanding:    
Basic12,17912,10812,15112,105
Diluted12,27712,19612,25612,204