Line Of Credit (Narrative) (Details) - CapitalSource [Member]	3 Months Ended
	Mar. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Expiration date	Dec. 27, 2019
Loan Facility [Member]
Line of Credit Facility [Line Items]
Line of credit, Covenant terms	CapitalSource has the right to terminate the Loan Facility at any time upon 120 days' prior written notice.
Maximum borrowing capacity	$ 3,200,000
Interest rate above prime rate	0.75%
Minimum cumulative amount of interest, per year	$ 30,000
Interest rate	6.25%
Loan fee, percentage	0.10%
Termination period prior written notice	120 days
Percent of accounts receivable borrowing capacity	50.00%
Line of credit, Covenant compliance	As of March 31, 2019, we were in compliance with all covenants under the Loan Facility.
Percent of finished goods inventory borrowing capacity	35.00%
Loan Facility [Member] | Accounts Receivable And Inventory [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 3,200,000
Current borrowing capacity	1,800,000
Amount drawn	952,000
Loan Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Maximum amount of finished goods inventory borrowing capacity	$ 475,000
Loan Facility [Member] | Minimum [Member] | Prime Rate [Member]
Line of Credit Facility [Line Items]
Prime rate	0.00%
Loan Facility [Member] | United States [Member]
Line of Credit Facility [Line Items]
Percent of accounts receivable borrowing capacity	85.00%
Loan Facility [Member] | Canada [Member]
Line of Credit Facility [Line Items]
Percent of accounts receivable borrowing capacity	50.00%
Maximum amount of accounts receivable borrowing capacity	$ 300,000