Long-Term Debt	3 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]
Long-term debt	Note 8 – Long-term debt: During the first three months of 2018, our wholly owned subsidiary, NLKW Holding, LLC had no borrowings or repayments under its $50 million secured revolving credit facility with Valhi. At March 31, 2018, we had outstanding borrowings of $0.5 million under such facility, and the remaining $49.5 million was available for future borrowing under this facility. Outstanding borrowings under such credit facility bear interest at the prime rate plus 1.875% per annum, and the average interest rate as of and for the three months ended March 31, 2018 was 6.625% and 6.40%, respectively. We are in compliance with all of the covenants contained in such facility at March 31, 2018.

Long-Term Debt

3 Months Ended

Mar. 31, 2018

Note 8 – Long-term debt:

During the first three months of 2018, our wholly owned subsidiary, NLKW Holding, LLC had no borrowings or repayments under its $50 million secured revolving credit facility with Valhi. At March 31, 2018, we had outstanding borrowings of $0.5 million under such facility, and the remaining $49.5 million was available for future borrowing under this facility. Outstanding borrowings under such credit facility bear interest at the prime rate plus 1.875% per annum, and the average interest rate as of and for the three months ended March 31, 2018 was 6.625% and 6.40%, respectively. We are in compliance with all of the covenants contained in such facility at March 31, 2018.