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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 15,852 | $ 23,385
Accounts receivable | 2,297 | 1,496
Current portion of notes receivable, net | 2,036 | 1,338
Inventory – equipment | 91 | 235
Other current assets | 447 | 498
Total current assets | 20,723 | 26,952
Non-current portion of notes receivable, net | 1,565 | 748
Equity method investments | 2,402 | 2,402
Right-of-use assets | 830 | 963
Property and equipment, net | 132 | 130
Intangible assets, net | 3,056 | 3,123
Goodwill | 5,585 | 5,585
Deferred tax assets | 4,450 | 4,402
Other assets | 246 | 250
Total assets | 38,989 | 44,555
Current liabilities: |  |
Accounts payable and accrued liabilities | 7,202 | 13,609
Current portion of lease liabilities | 301 | 380
Total current liabilities | 7,503 | 13,989
Non-current portion of lease liabilities | 564 | 623
Total liabilities | 8,067 | 14,612
Stockholders’ equity: |  |
Preferred stock, $10.00 par value, authorized 10,000,000 shares; issued and outstanding 568 shares of Series N as of March 31, 2021 and December 31, 2020 | 6 | 6
Common stock, $0.01 par value, authorized 300,000,000 shares; issued and outstanding 35,647,477 shares as of March 31, 2021 and 35,281,183 as of December 31, 2020 | 357 | 353
Additional paid-in capital | 293,343 | 293,400
Accumulated deficit | (262,784) | (263,816)
Total stockholders’ equity | 30,922 | 29,943
Total liabilities and stockholders’ equity | $ 38,989 | $ 44,555

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