CONCENTRATION OF SALES TO MAJOR CUSTOMERS - Note 4	3 Months Ended
Mar. 31, 2018
Risks and Uncertainties [Abstract]
CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS - Note 4	4. CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS Concentration of credit risk Financial instruments that potentially subject us to a concentration of credit risk are primarily cash equivalents and accounts receivable. We typically do not require collateral from our customers. As of March 31, 2018, our cash and cash equivalents are comprised of short-term highly rated money market savings accounts. Concentration of major customers and suppliers For the three months ended March 31, 2018, one commercial customer accounted for $2.1 million in revenue, representing 95% of our total revenue. For the three months ended March 31, 2017, one commercial customer accounted for $215,000 in revenue, representing 38% of our total revenue, a second commercial customer accounted for $204,000 in revenue, representing 36% of our total revenue, and a third commercial customer accounted for $97,000 in revenue, representing 17% of our total revenue. One commercial customer accounted for $2.5 million, or 99.9% of our net accounts receivable balance at March 31, 2018. A significant concentration of our components and the products we sell are currently manufactured and obtained from single or limited-source suppliers. The loss of any single or limited-source supplier, the failure of any of these suppliers to perform as expected, or the disruption in the supply chain of components from these suppliers could subject us to risks and uncertainties including, but not limited to, increased cost of sales, possible loss of revenues, or significant delays in product deliveries, any of which could adversely affect our financial condition and operating results.

CONCENTRATION OF SALES TO MAJOR CUSTOMERS - Note 4

3 Months Ended

Mar. 31, 2018

CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS - Note 4

4. CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS

Concentration of credit risk

Financial instruments that potentially subject us to a concentration of credit risk are primarily cash equivalents and accounts receivable. We typically do not require collateral from our customers. As of March 31, 2018, our cash and cash equivalents are comprised of short-term highly rated money market savings accounts.

Concentration of major customers and suppliers

For the three months ended March 31, 2018, one commercial customer accounted for $2.1 million in revenue, representing 95% of our total revenue. For the three months ended March 31, 2017, one commercial customer accounted for $215,000 in revenue, representing 38% of our total revenue, a second commercial customer accounted for $204,000 in revenue, representing 36% of our total revenue, and a third commercial customer accounted for $97,000 in revenue, representing 17% of our total revenue. One commercial customer accounted for $2.5 million, or 99.9% of our net accounts receivable balance at March 31, 2018.

A significant concentration of our components and the products we sell are currently manufactured and obtained from single or limited-source suppliers. The loss of any single or limited-source supplier, the failure of any of these suppliers to perform as expected, or the disruption in the supply chain of components from these suppliers could subject us to risks and uncertainties including, but not limited to, increased cost of sales, possible loss of revenues, or significant delays in product deliveries, any of which could adversely affect our financial condition and operating results.