CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS - Note 5	6 Months Ended
Jun. 30, 2018
Risks and Uncertainties [Abstract]
CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS - Note 5	5. 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 June 30, 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 and six months ended June 30, 2018, one commercial customer accounted for $2.0 million and $4.0 million in revenue, representing 97% and 96% of our total revenue, respectively. For the three and six months ended June 30, 2017, one commercial customer accounted for $769,000 and $973,000 in revenue, representing 57% and 51% of our total revenue, respectively. Additionally, a second commercial customer accounted for $227,000 and $442,000 in revenue, representing 17% and 23% of our total revenue for the three and six months ended June 30, 2017, respectively. A third commercial customer accounted for $107,000 and $204,000 in revenue, representing 8% and 11% of our total revenue for the three and six months ended June 30, 2017, respectively. One commercial customer accounted for $2.7 million, or 100% of our accounts receivable balance at June 30, 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 CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS - Note 5

6 Months Ended

Jun. 30, 2018

CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS AND SUPPLIERS - Note 5

5. 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 June 30, 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 and six months ended June 30, 2018, one commercial customer accounted for $2.0 million and $4.0 million in revenue, representing 97% and 96% of our total revenue, respectively. For the three and six months ended June 30, 2017, one commercial customer accounted for $769,000 and $973,000 in revenue, representing 57% and 51% of our total revenue, respectively. Additionally, a second commercial customer accounted for $227,000 and $442,000 in revenue, representing 17% and 23% of our total revenue for the three and six months ended June 30, 2017, respectively. A third commercial customer accounted for $107,000 and $204,000 in revenue, representing 8% and 11% of our total revenue for the three and six months ended June 30, 2017, respectively. One commercial customer accounted for $2.7 million, or 100% of our accounts receivable balance at June 30, 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.