2. Accounts Receivable	12 Months Ended
Dec. 31, 2017
Notes to Financial Statements
Accounts Receivable	At December 31, 2016 and 2017, the carrying value of the Company’s accounts receivable has been reduced to anticipated realizable value. As a result of this reduction of carrying value, the Company anticipates that substantially all of its net receivables reflected on the Consolidated Balance Sheets as of December 31, 2016 and 2017 will be collected. The allowance to reduce the receivables to anticipated net realizable value at December 31, 2016 was $1.2 million and at December 31, 2017 was $1.5 million. In 2015, the Company made an adjustment for valuation of receivables, including the receivables arising from the Heyser case, of $1.2 million. In 2016, the Company made an adjustment for valuation of receivables, including the receivables arising from the Heyser case, of $1.1 million. In 2017, the Company made an adjustment of $440,000 for valuation of receivables.

2. Accounts Receivable

12 Months Ended

Dec. 31, 2017

At December 31, 2016 and 2017, the carrying value of the Company’s accounts receivable has been reduced to anticipated realizable value. As a result of this reduction of carrying value, the Company anticipates that substantially all of its net receivables reflected on the Consolidated Balance Sheets as of December 31, 2016 and 2017 will be collected. The allowance to reduce the receivables to anticipated net realizable value at December 31, 2016 was $1.2 million and at December 31, 2017 was $1.5 million.

In 2015, the Company made an adjustment for valuation of receivables, including the receivables arising from the Heyser case, of $1.2 million. In 2016, the Company made an adjustment for valuation of receivables, including the receivables arising from the Heyser case, of $1.1 million. In 2017, the Company made an adjustment of $440,000 for valuation of receivables.