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Condensed Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Current Assets:    
Cash and cash equivalents $ 31,281 $ 28,086
Trade accounts receivable, net of allowance for doubtful accounts of $392 and $437, respectively 5,430 6,691
Inventory, net of allowance for obsolescence of $258 and $211, respectively 24,767 26,509
Prepaid income taxes 0 275
Prepaid expenses and other 402 475
Total current assets 61,880 62,036
Rental equipment, net of accumulated depreciation of $74,079 and $70,266, respectively 154,758 151,015
Property and equipment, net of accumulated depreciation of $8,830 and $8,441 respectively 7,244 7,475
Goodwill 10,039 10,039
Intangibles, net of accumulated amortization of $2,097 and $2,060, respectively 2,121 2,157
Other assets 29 29
Total assets 236,071 232,751
Current Liabilities:    
Accounts payable 2,543 3,420
Accrued liabilities 4,766 5,817
Current income tax liability 6 522
Deferred income 1,466 2,027
Total current liabilities 8,781 11,786
Line of credit, non-current portion 897 897
Deferred income tax liability 46,189 43,741
Other long-term liabilities 222 502
Total liabilities 56,089 56,926
Commitments and contingencies (Note 8)      
Stockholders’ Equity:    
Preferred stock, 5,000 shares authorized, no shares issued or outstanding 0 0
Common stock, 30,000 shares authorized, par value $0.01; 12,306 and 12,241 shares issued and outstanding, respectively 123 122
Additional paid-in capital 88,985 88,823
Retained earnings 90,874 86,880
Total stockholders' equity 179,982 175,825
Total liabilities and stockholders' equity $ 236,071 $ 232,751