XML 23 R5.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Condensed Statements of Cash Flows (Unaudited) (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 346,888 $ 491,613
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 197,026 202,478
Amortization 24,958 27,626
Stock based compensation 12,642 14,487
Gain on sale of equipment and vehicles   (10,766)
Loss on intangible asset abandonment   29,918
Changes in working capital components:    
Trade receivables (343,280) (39,844)
Inventory (379,540) 49,360
Deposits, prepaid expenses and other assets (37,699) (161,798)
Accounts payable 20,665 61,168
Accrued expenses 70,833 (22,251)
Income taxes payable 3,660 20,131
Net cash provided by operating activities (83,847) 662,122
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (114,628) (121,646)
Proceeds from sale of equipment and vehicles   19,200
Purchases of intangibles (41,726) (22,660)
Purchases of short-term investments (1,828,148) (1,207,412)
Proceeds on sale of short-term investments 1,814,190 400,000
Net cash used in investing activities (170,312) (932,518)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Repurchase of common stock (2,079)  
Proceeds from exercise of stock options 68,210 33,990
Net cash provided by financing activities 66,131 33,990
NET DECREASE IN CASH (188,028) (236,406)
CASH AT BEGINNING OF PERIOD 1,291,383 1,304,586
CASH AT END OF PERIOD 1,103,355 1,068,180
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Cash paid for income taxes, net of refunds received of $4,090 and $81,422, respectively $ 11,889 $ 156,149