The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mkrgsKuFE

Height: 201
Hash: 250e67e1fd78e9646d16faa8f9b55f6ac477ce7146b831e50f1c912af45ee824
Previous block: 2679d9cfe4a3cf7c589fa403f258b37cb315269b65eb8d104a7b3c1067b3640a
Next block:
Weight: 912
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1544074767
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: 1e5db8549d6121577e24013588b4bcdce5ebc4df6dd2c1b87194b3955d2e964a
Median time: 1544074766
Difficulty: 4.656542373906925e-10
Confirmations: 1
Chainwork: 0000000000000000000000000000000000000000000000000000000000000194
Bits: 207fffff