Three Months Ended
March 31,

(in thousands)

2019

2018

Cash paid during the period for:

Interest

$

1,875

$

336

Non-cash transactions:

Accounts payable and accrued liabilities

$

82

$

(71

)

Non-cash acquisition of Carbon California interests

$

-

$

(18,906

)

Carbon California Acquisition on February 1, 2018

$

-

$

17,114

Exercise of warrant derivative

$

-

$

(1,792

)

Old Ironsides Notes interest paid-in-kind

$

594

-