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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Operating activities:    
Net loss $ (2,081) $ (789)
Adjustments to reconcile net loss to cash used in operating activities:    
Depreciation and amortization 322 344
(Gain) on disposal of fixed asset   (12)
Share-based compensation 204 183
Changes in assets and liabilities related to operations:    
Trade accounts receivable 286 (681)
Inventories (857) (367)
Prepaid expenses and other assets (104) 27
Accounts payable 518 369
Accrued expenses 370 (34)
Net cash used in operating activities (1,342) (960)
Investing activities:    
Acquisition of equipment and leasehold improvements (160) (209)
Proceeds from disposal of equipment   137
Net cash used in investing activities (160) (72)
Financing activities:    
Principal payment on capital leases (169) (139)
Proceeds from line of credit, bank 1,200 300
Payments to the line of credit, bank (1,500)  
Proceeds from Beachcorp term loan 500  
Proceeds from line of credit, Beachcorp LLC 970  
Payments to line of credit, Beachcorp LLC (138)  
Proceeds from sale of common stock   1,000
Proceeds from exercise of stock options 29 47
Net cash provided by financing activities 892 1,208
(Decrease) Increase in cash and cash equivalents (610) 176
Cash and cash equivalents at beginning of period 1,955 1,779
Cash and cash equivalents at end of period 1,345 1,955
Supplemental cash flow information:    
Interest paid 51 34
Supplemental non-cash investing and financing activities:    
Accounts payable incurred for the purchase of equipment and leasehold improvements 52  
Capital lease obligations incurred in the purchase of equipment $ 334 $ 481