Related party balances as of and for the years ended December 31, 2018 and 2017 are as follows, in thousands:


		2018		2017
K&R, LLC and 7100 LLC:
Deposit amounts owed to the Company by related parties	(1)	$	42	$	42
Prepaid expenses to related parties	(1)	43		43
Notes payable to related parties	(3)	1,536		1,600
Facility rent payable to related parties	(2)	—		123
Facility rent expense to related parties	(4)	450		597
Interest expense to related parties	(4)	75		75

Board of Directors: *
Accounts payable to the Board of Directors for fees	(2)	$	—	$	50
Board of director fee expense	(4)	257		200
Board portion of share-based compensation expense	(4)	50		—

LK Property Investments, LLC:
Lease deposit to LK Property	(1)	$	3	$	3
Prepaid expenses to LK Property	(1)	3		3
Accounts payable to LK Property	(2)	2		—
Rent expense to LK Property**	(4)	36		36

Metal X, LLC:
Accounts receivable from Metal X	(1)	$	—	$	1
Revenue from product sales to Metal X	(4)	—		188

* Excludes insignificant amount of travel reimbursement.

**Excludes amounts reimbursed to LK Properties for utilities and property tax.

(1)	Included in receivable and other assets from related parties on the Consolidated Balance Sheets; balances are as of December 31, 2018 and 2017.
(2)	Included in payables and accrued expenses to related parties on the Consolidated Balance Sheets; balances are as of December 31, 2018 and 2017.
(3)	Included in current maturities of long-term debt, related parties and long-term debt related parties on the Consolidated Balance Sheets; balance is as of December 31, 2018 and 2017.
(4)	Included in the Consolidated Statements of Operations; balances are for the year ended December 31, 2018 and 2017.